Kneel for 75 calculation problems and 30 application problems in the first semester of grade six
1.3.375+5.75+2.25+6.625
3. 100 1-9036÷ 18
4.3.8×5.25+ 14.5
What is the quotient of 7.50 minus 12.5 divided by 2.5?
8. The sum of 6 times of a certain number and 4 is equal to 19.25. Find a number. (Equation solution)
15.36-3
2. 1×4.3+5.7×2. 1
4. 102×45-328
5.2.8×3. 1+ 17.6÷8
6. 19.2 minus the sum of 8.5 and 4.3, what's the difference?
7. 30% of a number is 6 and less than 18. Find this number.
1.6 1 10×47+639
2.3.5×2.7-52.2÷ 18
4.3.375×0.97+0.97×6.625
6.5 Subtract the product of 2 and 1 and divide it by 5. What is the quotient?
7. A certain number is greater than 70, 10. How do you find a number? Equation solution
1.6.54+2.4+3.46+0.6
2.95.6× 1.8+95.6×8.2
3.600-420÷ 12
7.344÷3.6-5.4×0.25
5. 15.6÷[ 16×(0.25+0. 125)]
6. 158 minus 80 divided by 13, what is the quotient?
7.7.5 If you subtract a number, the difference is 6. Find this number. (Equation solution)
1.300 1- 1998
3.5000- 105×34
4.0. 15÷0.25+0.75× 1.2
What is the quotient of 6.309 divided by the sum of 4 1.25 and 5.75?
7. A number plus 1.2 equals 10. Find this number. (Equation solution)
3.300-4263÷2 1
What is the quotient of the sum of 7.5 divided by the sum?
8. A number is 4.5 more than yourself. Find this number. (Equation solution)
3. 1.8×3
4.403÷ 13×27
5. 1.5×4.2-0.75÷0.25
What's the difference between subtracting 3 from 6.54 and dividing by 0.5?
7. The sum of 65% of a number is 1.5. Find this number. (Equation solution)
5. 1025-768÷32
6.0.25×80-0.45÷0.9
7. What is the product of the number 13 greater than 47 times 5 minus 4.25?
8. The difference between 3 times a number minus 4.5 is 1.5. Find this number. (Equation solution)
1.0.25×2.69×4
3.2348+275× 16
5.2.4+2.4×(5.375-3.375)
7. A number 2.4 less than a number is 1.8. Find this number. (Equation solution)
8.4.5 Subtract the product of 1.5 times 2.5. What is the difference?
1.645-45× 12
3.0. 15+ 1.2÷0.24-0.45
4.3.75-(2.35+0.25÷ 1.25)
5.76× +23×25%+0.25
6. 10-2.87-7. 13
7.0.96+9.6×9.9
What's the difference between 8.7.5 and 5.7?
9. 40% of a number minus 9.6 equals 6.4. Find this number. (Equation solution)
1. 12.37-3.25-6.75
2. 16×6.8+2.2× 16+ 16
3.40 1× 19+284
4.58.7- 16.65÷3.7
5.0.4×4.7×2.5+(2.3+5.3)
6.3.6 What is the sum of the quotient divided by 2.5 and 12. 1?
7. 0.4 of a number is 0.5 more than 0.9. Find this number. (Equation solution)
1.9.3 1- 1. 125-7.875
3.640+ 128×45
4.8.2× 1.6-0.336÷4.2
What is the product of 7.400 times the sum of 0.62 and 0.08?
8. 2.5 times of a number is equal to the sum of 37 and 8. Find this number. (Equation solution)
0. 1-0.0 1= 0.24×5= 5.8×9+5.8= ÷ 10= × = 7.2÷0.08=
3. 14×25= 3. 14×36= 3. 14×9= 3. 14× 12=
3. 14×5 = 28.26÷3. 14=
Application problem: 1. The pasture is full of grass, which grows at a constant speed every day. This pasture can feed 10 cows for 20 days, 15 cows 10 days. How many days can it feed 25 cows?
2. There is a pasture where 27 cows can eat for 6 weeks or 23 cows can eat for 9 weeks. If the pasture grows at a constant speed every week, how many weeks can 2 1 cow eat?
When a ship found water leakage, it had entered some water, and now the water enters the ship at a constant speed. 10 people can wash water in 3 hours; Five people can wash water for eight hours. How many people should I arrange if I finish washing in two hours?
There is a piece of grass that grows at a constant speed every day. Now send 17 people to mow the grass, which will take 30 days. If you send 19 people to mow the grass, it will take 24 days to finish it. If it takes six days to mow the grass, how many people need to be sent to mow it?
5. There is a barrel of wine, and the same amount of wine is missed every day because there is a crack in the barrel. Now, if you give this barrel of wine to six people, you can finish it in four days; If four people drink it, they can finish it in five days. How many people can drink this barrel of wine every day?
6. One water stores a certain amount of water, and the river water is evenly put into storage. Five pumps can continuously drain water for 20 days; Six identical pumps can continuously drain water 15 days. How many identical pumps do you need to empty in six days?
7. There is a pasture where 17 cows can eat grass in 30 days and 19 cows can eat grass in 24 days. There were several cows, and after six days, they sold four, and then they ate the grass in the remaining two days. How many cows are there (the grass grows at a constant speed every day)?
1, a class took out some students to participate in the festival performance and tried to form a square phalanx. As a result, there were 7 more students; If there is one more row in each row and four fewer people in each column, how many students will be drawn out?
2. How many pieces can a square with 8 pieces on each side be arranged? What is the total number of pieces? How many pieces are there on the outermost layer of chess pieces?
There are several students, arranged in a five-story hollow square. The number of students on each side of the outermost layer is 12. How many students are there?
4. Design a group gymnastics performance team, and want to arrange it in a six-story hollow square. It is known that 360 people participated in the performance. How many people should be arranged on each side of the outermost layer?
In the 5th Sports Meeting, Hongxing Primary School formed a big square. The outermost square team has 30 people on each side, with a total of 10 floor. On the fifth floor, 20 students held the emblem of the sports meeting and asked how many students there were in this team.
6. There is a group of students, arranged in a hollow square. The outermost number is ***56 and the innermost number is ***32. How many students are there in this group?
7, group gymnastics performance, young pioneers arranged in a four-story hollow square, each side of the outermost number is 10, ask how many young pioneers participated in the group gymnastics performance?
7. For a project, it takes 15 hours for Party A to do it alone, 18 hours for Party B to do it alone and 20 hours for Party C to complete it. If Party A works 1 hour, then Party B takes over 1 hour, then Party C takes over 1 hour, and then Party A takes over 1 hour, and so on, how many hours will it take to complete the whole project?
8. Open pipe A to drain the reservoir of water supply company within 8 hours, open pipe C to drain it within 12 hours ... If pipe A and pipe B are opened, the water can be drained within 4 hours. How many hours will it take to empty the swimming pool if pipes B and C are open?
9. There is a fountain in Hero Square. The single nozzle of the fountain can fill 1 hour, and the single nozzle of the fountain can fill for 30 minutes. After the two pipelines are opened for 8 3/4 hours at the same time, the water can be filled with 5 1/4 tons. How many tons can this fountain hold?
10, processing a batch of parts, Party A will do it alone for 6 days and Party B will do it alone for 8 days, and both of them will be processed at the same time. When completing the task, Party A made 30 more parts than Party B. How many parts are there in this batch?
1 1. It takes 10 hour for a car to drive from station A and 15 hour for a car to drive from station A. Two cars start from two opposite stations at the same time and meet at a distance of 40 kilometers. How many kilometers are the two stops apart?
12, a bus and a truck leave station A for bilibili at the same time. After the bus arrives in bilibili, it returns immediately and meets bilibili at 58km. It is known that the whole journey of Line A is 9 hours, and Line B 15 hours ... Find the distance between Station A and bilibili.
13, A and B leave Tianjin for Shanghai at the same time. A bus arrives in Shanghai and will return immediately. After returning, I did the whole journey of 1/6, and then I met with car B. The two cars drove for five 2/9 hours. It is known that car A travels more per hour than car B18km. Find the distance from Tianjin to Shanghai.
14. Two candles with different thickness and length can be lit for 6 hours, and the short one can be lit for 9 hours. After two hours, the remaining length of the two candles is exactly the same. The length of a long candle is a fraction of that of a short candle.
Two kinds of food *** 100 Jin, with a total value of several yuan. Now, after the price of A is reduced by 20% and the price of B is increased by 20%, the total value of two kinds of food per kilogram of 9.6 yuan is less 140 yuan. How much is each of these two foods?
A and B walk at the same speed. The train came, after A 8 seconds. Five minutes and seven seconds were overtaken by B. How long will it take for Party A and Party B to meet?
Project A is completed by A alone 18 days, and by B alone for 24 days. A rested for 3 days, B rested for a few days, and finally finished in 15. B how many days did you rest?
Distribute two baskets of apples to Class A, Class B and Class C. Class A gets 2/5 of the total, and the rest is distributed to Class B and Class C at 5: 7. It is known that the weight of the second basket of apples is 9/ 10 of that of the first basket, which is 5 kg less than that of the first basket. Apples shared by Class A, Class B and Class C are _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
3. Let A and B make a2000b with 6 digits divisible by 26. All such six digits are _ _ _ _ _.
4. Cut the 8×8 square paper on the right side into four figures with the same shape and size along the grid line, so that each one has the words Luo, Niu and Shan. Draw the result of cutting with a solid line on the diagram.
5. A container filled with salt water. The teacher asked Xiao Qiang to pour 800g of 5% salt water to make 20% salt water. But Xiao Qiang mistakenly poured 800 grams of water. After the teacher found it, he said, Never mind, pour 400 grams of salt water for the third time into the container, and you can get 20% salt water. Then the concentration of the third brine is _ _ _ _%.
6. Set 6 pockets to hold 18, 19, 2 1, 23, 25 and 34 balls respectively. Xiao Wang took three of them and Xiao Li took the other two. If Xiao Wang gets twice as many balls as Xiao Li, then Xiao Wang gets _ _ _ _ _ _ _.
7. A pool is equipped with two water pipes, A and B. The hourly displacement of pipe B is 75% of that of pipe A. First, pipe B is used to drain water for 5 hours, and then pipe A is used to drain water. As a result, the water in the pool is emptied 1 hour earlier than that of pipe B alone. If 120 tons of water is drained by the second pipe, the water in the pool can be drained 2 hours earlier than that by only using the second pipe. So the original water in the pool is _ _ _ _ _ _ _ tons.
8. In the picture on the right, the quadrangles FMCG and FDHG are trapezoidal. D is the midpoint of BC, BE= BA, MF= MA, and the area of △ABC is 1. Then the area of trapezoidal FDHG is _ _ _ _ _ _ _.
9. Three cars, A, B and C, travel from City A to City B at the same speed. Car A had an accident after driving 1 hour, and cars B and C drove as usual. After a car stopped for half an hour, it continued to move at 4/5 of its original speed. Two cars, B and C, went to a city 200 kilometers away. Car B had an accident and car C was driving as usual. After stopping for half an hour, car B continued to drive at 4/5 of its original speed. Results The time to arrive in B city was earlier than that of B train 1 hour, and B train was earlier than that of A train 1 hour. The distance between city A and city B is _ _ _ _ _ _ _ kilometers.
1 1. Suppose that in four arrays composed of four different positive integers, the sum of the smallest number and the average of the other three numbers is 17, while the sum of the largest number and the average of the other three numbers is 29. In the four arrays that meet the above conditions, the maximum number is _ _ _ _ _ _ _.
12. The number ratio of the first and second construction teams is 3: 4, and the efficiency ratio of each person is 5: 4. Two teams accepted two projects with the same workload and conditions at the same time. As a result, the second team finished 9 days earlier than the first team. Later, two-thirds of the workers in the first team and two-thirds of the workers in the second team13 formed a new team, and the rest of the workers formed a new team. At the same time, two new teams accepted two projects with exactly the same workload and conditions. Therefore, the new team 2 finished six days earlier than the new team 1. Then the ratio of the workload of the two projects before and after is _ _ _ _ _ _.
1.Class A and Class B each have a library with 303 books. It is known that 5/ 13 of A-type books and 1/4 of B-type books together form 95 books, so A-type books have _ _ _ _ _ _.
2. Let the sum of the digits of the answers to the above questions be a. The clock in Xiao Ning and the clock in the school go normally, but the clock in Xiao Ning is fast and the clock in the school is accurate. Xiao Ning left home for school at 8: 00 at home. When she arrived at school, the school clock was 7: 50. Go home after school at noon, according to the school clock 12. When he got home, the clock at home was exactly 12: 34. If Xiao Ning spends the same time on his way to and from school, then Xiao Ning's clock will be set forward by _ _ _ _ _ _ _ _ minutes.
3. Set the number of answers to the above questions as b, as shown in the figure, there is a rectangle with a length of b/4 and a width of 1 in the big square. The vertices of the rectangle are all on the side of the square, and the symmetry axis of the rectangle coincides with the diagonal of the square, so the area of the square is _ _ _ _ _.
4. Let the integer part of the number of answers to the above questions be c, and if 1/c is expressed as the sum of two different decimal units, then * * * has _ _ _ _ different representations (only different summation orders are regarded as one).
5. Let the number of answers to the above questions be D. When Wang Li is as old as thomas lee, Liu Qiang is D years younger than the sum of Wang Li and thomas lee. When Liu Qiang is now as old as Wang Li, Wang Li was _ _ _ _ _ _ _ _.
6. If the number of answers to the above questions is set to E, all four digits consisting of 2, 3, 5 and E will be arranged in a column from small to large, and the 56th number in the column is _ _ _ _ _ _ _ _.
7. Let the unit number of the answers to the above questions be f, and there are 10 integers arranged in a circle. Replace each integer with the average of two adjacent numbers, and the result is shown in the figure. Then the original number of the position occupied by the number f in the figure is _ _ _ _ _ _ _.
8. Let 2 times the number of answers to the above questions be g. There are a set of positive integers, in which the g times of the difference between any two numbers is not less than their product. Then this set of positive integers has at most _ _ _ _ _ _ _.
Serial number problem: 1, find the sum of 1+2+3+4+ ... +24+25.
2. A number = 1+3+5+...+97+99, B number = 2+4+6+...+98+ 100. Q: Which is bigger? How much bigger?
3. What is the sum of all natural numbers from 4 to 8 1?
4. The sum of five consecutive natural numbers is 100. What are these five numbers?
5. The sum of four consecutive natural numbers is 162. Find these four numbers.
6. What is the sum of all even numbers less than 10 1?
7. The sum of seven consecutive natural numbers is 105, of which what is the smallest number? What is the maximum number?
The sum of 39 consecutive odd numbers is 1989. What is the largest odd number?
9. What is the sum of all three digits?
Fifty-two students from 10 grade and grade 3 stood in four rows to take pictures, with two more people in each row than in the previous row. How many people stood in each row?
1 1, fifteen consecutive natural numbers, the maximum number is three times the minimum number. What is the sum of these fifteen numbers?
The sum of eight consecutive natural numbers from 12, 1 1 to 18 plus 1992 is exactly equal to the sum of the other eight consecutive natural numbers. What is the smallest of the other eight continuous natural numbers?
13, four consecutive odd numbers, the first one is 19/2 1 of the fourth number, so what is the sum of these four numbers?
14 has n continuous natural numbers from 1 to n, among which the even sum is 90, the odd sum is 100, and n is smaller.
15 Of the 100 continuous natural numbers starting from 1992, how much is the sum of the top 50 less than the sum of the bottom 50?
1 6,3 =1+2,2 is a continuous natural number. How many numbers can the sum of continuous natural numbers within 10 represent? Please write them down. Can 35 be expressed by the sum of several consecutive natural numbers? If so, how many representations can you write? Please write it down.
17. Some numbers can be expressed as the sum of three continuous natural numbers, four continuous natural numbers and five continuous natural numbers. For example, 30 meets the above requirements. Because 30 = 9+10+11,30 = 6+7+8+9, 30 = 4+5+6+7+8. Please find all the numbers between 700 and 1000 that meet the above requirements and briefly explain the reasons.
18, three consecutive even numbers. If the largest even number adds 6, it is exactly half of the sum of the original three even numbers. What is the largest even number?
Is the sum of 19,1+2+3+4+…+1990+1991odd or even?
20. What is the sum of all odd numbers from100 to 200?
The sum of 2 1, 100 consecutive natural numbers is 8450. What is the first natural number?
22. In the two digits 10, 1 1, ..., 98, 99, add a decimal point between the single digit and the ten digits after each number is divided by 7, and the remaining numbers remain unchanged. Q: What is the sum of all the figures after this change?
There are two kinds of 1. Sugar water: A contains 270g sugar, water 30g, B contains 400g sugar, and water 100g. Now we want to get 100g sugar water with 82.5% concentration. How many grams should we each eat?
2. A container contains 65,438+00 liters of pure alcohol. After pouring out 1 l, fill it with water, then pour out 1 l, and then pour out 1 l. What is the concentration of alcohol solution in the container?
3. A few kilograms of 4% salt water evaporated a part of the water and became 10% salt water. After adding 300 grams of 4% salt water, it becomes 6.4% salt water. How many kilograms was the original salt water?
4. It is known that the concentration of a few grams of brine becomes 3% after adding a certain amount of water for the first time, and it becomes 2% after adding the same amount of water for the second time. Add the same amount of water for the third time to find the concentration of brine.
5. There are three kinds of brines, A, B and C, which are mixed according to the quantity ratio of A to B of 2: 1 to obtain brines with the concentration of 13%; According to the mass ratio of A to B 1: 2, the brine with the concentration of 14% was obtained; According to the mass ratio of A, B and C 1: 1: 3, the brine with the concentration of 10.2% was obtained. What is the concentration of brine C?
Logic question: 1, A, B, C and D have different numbers printed on their jerseys. Zhao said: A is number two, and B is number three; Qian said: C is number 4, and B is number 2; Sun said: Ding is No.2 and C is 3C; Li said it was 1 and b was 3. I also know that Zhao, Qian, Sun and Li are half right, so the number of C is ().
2. There is a club whose members can be divided into two categories. The first is an honest man who always tells the truth. The second kind is a liar, always lying. One day, all the members of the club sat around a round table. Every honest man is surrounded by liars, and every liar is surrounded by honest people. The reporter asked Zhang San, a member of the club: How many members are there in the club? Zhang San replied: 45 people. Li Si said: Zhang San is an honest man, so is Li Si an honest man or a liar?
3. In a swimming competition, A, B, C and D participated in the final. Before the game, each of them said a word about the game. A said: I am the first and B is the second. B said: I am the first, and A is the fourth. C said: I am the first, and B is the fourth. Ding said: I am fourth and C is first. The result of the game was neck and neck, and everyone was only half right. Then, Ding is the first ().
Thirty students took part in the math contest. It is known that there is at least one boy in any contestant of 10, so there are at least () boys.
5. Party A, Party B, Party C and Party D play badminton doubles. It is known that (1) A is younger than B; (2) Ding is older than his two opponents; (3) A is older than his companion; (4) The age gap between A and B is greater than that between C and D. Try to judge who is the companion and tell the order of four people from small to large.
At an international football invitational tournament, five teams from Europe, America, Asia, Oceania and Africa all arrived. At the group draw ceremony, several reporters discussed the number of teams. A reporter: No.3 is the European team and No.2 is the American team; B reporter: No.4 is the Asian team and No.2 is the Oceania team; C reporter: 1No. is the Asian team and No.5 is the African team; D reporter: No.4 is the African team and No.3 is the Oceania team; E reporter: No.2 is the European team, and No.5 is the American team. As a result, everyone guessed only half right, so 1 is the () team, and No.3 is the () team.
7. The teacher issues different integer A, B and C cards.
Teacher: A's card is written with a two-digit integer, B's card is written with a one-digit integer, C's card is written with a two-digit integer less than 60, and A's number ×B's number = C's number. Please look at your numbers first, and then guess what the other two students' numbers are.
A: I can't guess the other two.
C: I can't guess the other two.
A listened to C and asked B: Can you guess the number of C and me?
I can't guess the number of you two.
I heard. A: I already know the numbers of B and C. The number of B is () and the number of C is (). Right?
So, what are the numbers on the cards in the hands of three people?
A is (), B is () and C is ().
8. There are two red balls, two white balls and one red and one white ball in three boxes, but the labels on the outside of the boxes are all wrong. If only one ball is pulled out from one of the boxes, it is necessary to clearly determine what balls are contained in each of the three boxes, and a ball must be pulled out from the box where the ball is stuck (); If it is () colored ball, this box contains () ball, then the box with () ball contains () ball, and the rest boxes contain () ball.
9. It is known that three students, A, B and C, are wearing three different colors of hats and three different colors of clothes to participate in an activity to host the Olympic Games:
(1) The colors of hats and clothes are only red, yellow and blue;
(2) A didn't wear a red hat and B didn't wear a yellow hat;
(3) Students wearing red hats don't wear blue clothes;
(4) Students wearing yellow hats don't wear red clothes;
(5) B is not wearing yellow clothes.
What color hats do A, B and C wear? What color clothes to wear?
10, Xiaoming, Xiaohua, Xiao Qiang, Xiaoying and Xiaolan are sitting in the same row. Xiaohua, Xiao Qiang and Xiaolan each said three sentences.
(1) Xiaohua: There are two people between me and Xiao Qiang. Xiaoming is closest to Xiao Qiang. Xiaolan and I are adjacent.
Xiao Qiang: Xiaolan and I are neighbors. I am also adjacent to Xiaohua. There are two people between Xiaohua and me.
Xiaolan: I am closest to Xiao Qiang. Xiaohua and I are neighbors. There is a man between Xiao Ming and me.
If only two of everyone's three sentences are true, then ask: who is sitting in the middle?
Six players (1 1, A, B, C, D, E, F) play a single round table tennis competition (each player plays one game with other players), and each player plays one game on three tables at the same time every day. It is known that on the first day, B played against D, on the second day, C played against E, on the third day, D played against F, and on the fourth day, B played against C. Q: Who played a game with on the fifth day? Who is playing with whom on the other two tables?
Fraction application problem: 1, a bag of noodles, the first time I used 1/3, it was exactly 4 kilograms, and the second time I used 1/4, how many kilograms is left?
A factory plans to produce a batch of parts. The first time 1/2, the second time 3/7, and the third time 450 parts were completed, and the result exceeded the planned 1/4. How many parts are planned to be produced?
Master Zhang finished a batch of parts in four days. On the first day and the second day, * * * made 54 yuan, and on the third day and the fourth day, * * * made 90 yuan. It is known that the quantity made the next day accounts for 1/5 of this batch of parts. How many parts are there in this batch?
4. Half of the boys in Class 6 (2) and 1/4 * * 16 girls, half of the girls and 1/4 * * 14 boys. How many students are there in Class Six (2)?
5. Party A, Party B, Party C and Party D have planted 600 trees. The number of trees in A species is 1/2, B species is 1/3, C species is 1/4 and D species is 1/4.
6.5 (2) Class originally planned to allocate 1/5 people to participate in cultural and entertainment performances, and 2 people participated temporarily, so that the actual number of participants was the rest 1/3. How many people were originally planned to attend the cultural and entertainment performance?
7. The three workshops of the toy factory make a batch of toys together. The first workshop made 2/7 of the total, the second workshop made 1600, and the third workshop made half of the sum of the first and second workshops. How many toys are there in this batch? (two solutions)
8. There are five consecutive even numbers. It is known that the third number is more than the sum of the first number and the fifth number 1/4. What is the sum of these five even numbers?
9. There are 54 people in Group A and Group B. The number of people in Group A is 1/4, which is equal to the number of people in Group B. How many people are there in Group A than in Group B?
10, and the circumference of the rectangle is 130 cm. If the length increases by 2/7 and the width decreases by 1/3, the circumference of the new rectangle will remain unchanged. Find the length and width of the original rectangle.
1 1. There are 5400 original literature and art books and science and technology books in the school library, among which science and technology books are less than literature and art books 1/5. I bought a batch of science and technology books recently. At this time, the ratio of science and technology books to literature and art books is 9: 10. How many science and technology books did the library buy?
12. Originally, the ratio of money between Party A and Party B was 3: 4. Later, Party A gave 50 yuan to Party B. At this time, Party A's money was12. How much did Party A and Party B have?
13, the price ratio of A and B is 7: 3. If their prices rise by 70 yuan respectively, then their price ratio is 7: 4. What is the original price of commodity A?
14. The sum of the numerator and denominator of the simplest fraction is 49 people. After the numerator adds 4 and the denominator subtracts 4, the new score can be reduced to 3/4. Looking for the original score?
15, Party A and Party B each saved a few yuan. After the deposit paid by Party A to Party B 1/5, Party B pays the existing deposit to Party A 1/4. At this time, they all have 180 yuan. How much did each of them save?
16. There is a peach tree on the hill. A monkey went to steal peaches. On the first day, he stole110, and in the next eight days, he stole 1/9, 1/8 and 1/7 of existing peaches respectively. How many peaches are there on the tree?
17, a bunch of watermelons, 1/4 and 4 of the total amount sold for the first time, the remaining 1/2 and 2 for the second time, and the remaining 1/2 and 2 for the third time, leaving 2. How many watermelons are there in this pile?
18, Xiao Ming reads a book. On the first day, he finished reading 1/8 of this book in 16 pages. The next day, he read 1/6 of the book, and two pages were missing, leaving 88 pages. How many pages are there in this book?
In the first experiment, * * *, there were 19 students in grade five, and11boys and 5 girls participated in the science and technology group, and the rest were just equal. How many boys and girls are there in Grade Five?
20. Class A and Class B * * total 162 people. The number of participants in Class A is less than that in Class B 1/5, and Class B is less 1/4. How many people from Class A and Class B participate in the activities of the Science and Technology Group?
Summary of application questions: 1. The engineering team planned to build a 4,800-meter-long road with 60 people in five days, but in fact, 20 people were added, and each person built 4 meters more than planned every day. How many days did it take to actually complete this road?
2. (encounter problems) Two cars A and B start from east and west at the same time. Car A travels 56 kilometers per hour and car B travels 48 kilometers per hour. The two cars met at a distance of 40 kilometers from the midpoint. How many kilometers are there between things?
(Follow-up question) The bus and the car leave in the same place and in the same direction. The bus travels 60 kilometers per hour and the car travels 84 kilometers per hour. The bus did not leave until two hours after the bus left. How many hours will the bus catch up with?
4. (Crossing the Bridge) The train crosses a 2700-meter-long bridge. It takes 3 minutes to get on the bridge from the front and get off the bridge from the back. The known train speed is 1000 meters per minute. How long is the train body?
5. (Wrong train) The passenger train is 280 meters long and the freight train is 200 meters long. They walk opposite each other on parallel tracks, and it takes 20 seconds from the time when two cars meet to the time when the next car leaves. If two cars are driving in the same direction, with the truck in front and the bus behind, the time from the moment when the front of the bus meets the rear of the truck to the moment when the rear of the bus leaves the front of the truck is 120 seconds. What are the speeds of the bus and the truck respectively?
6. (Navigation) Passenger ships and cargo ships leave from Port A and Port B at the same time. Six hours later, the passenger ship and the cargo ship met, but there were still six kilometers from the midpoint of the two ports. It is known that the speed of passenger ships in still water is 30 kilometers per hour, and that of cargo ships in still water is 24 kilometers per hour. What is the current speed?
7. Xiao Li has 30 stamps and Xiao Liu has 15 stamps. How many stamps did Xiao Liu give Xiao Li, and the number of stamps of Xiao Li is eight times that of Xiao Liu?
8. The students donated money for Project Hope. The donation in grade six is three times that in grade two. If 160 yuan is put into the second grade from the donation of the sixth grade, then the donation of the sixth grade is 40 yuan more than that of the second grade. How much do the two grades donate respectively?
9. (Sum and Difference Problem) A two-story bookshelf can hold 72 books. If you take out nine books from the upper level to the lower level, the upper level has four more books than the lower level. How many books are there on each floor?
10. (Periodic problem) July 2006 1 is Saturday. What day is today?
1 1. (Chickens and rabbits in the same cage) Xiaoli bought 50 exercise books from 0.8 yuan and 0.4 yuan respectively and paid RMB 32 yuan. How many exercise books are there in 0.8 yuan?
12. Five years ago, my father was seven times older than my son. After 15, the father is twice as old as his son. How old are my father and son this year?
13. (profit and loss problem) Teacher Wang distributed notebooks to students, with 6 copies for each student, leaving 4 1 book, with 8 copies and 29 copies for each student. How many students are there? How many notebooks are there?
14. (Reduction problem) Convenience fruit shops sell mangoes. For the first time, they sell more than half of the total mangoes, for the second time, they sell more than half with 1, and for the third time, they sell less than half with 1. At this time, only 1 1 mango is left. How many mangoes are there in the fruit shop?
15. The school bought 6 tables and 6 chairs, and spent 192 yuan. As we all know, the price of three tables is equal to the price of five chairs. How much is each table and chair?
16. (Best arrangement) Only two loaves can be baked on the baking rack at a time, and it takes 2 minutes to bake one loaf on each side. How many minutes does it take to bake three loaves of bread?
17. Oil drum problem) Weight of a barrel of oil 18kg. After removing half of the oil, the barrel weighs 9.75 kilograms. How many kilograms is the original oil? How much does this bucket weigh?
⑻ Qingqing Farm has * * * chickens, ducks and geese *** 12 100. There are twice as many ducks as chickens, and four times as many geese as ducks. How many chickens, ducks and geese are there?
19. The experimental primary school held a math contest. Every time you do a right question, you get 9 points, and if you do a wrong question, you get 3 points. * * * There are 12 questions, and Xiao Wang scored 84 points. How many questions did Xiao Wang do wrong?
20. (Meeting problem) A and B walk in opposite directions from two places 2000 meters apart at the same time. A walks 55 meters per minute, and B walks 45 meters per minute. If the dog and A walk in the same direction at the same time, walk120m per minute. Immediately after meeting B, turn back and run to A, then run to B. How many meters did the dog walk before meeting A and B?