Sophomore Sudoku 6-grid skill sophomore
The six squares of second-grade Sudoku are simplified versions of Sudoku games, which consist of 2 rows and 3 columns. Each square is filled with the number 1~6, and each number can only appear once in each row and column. For the second-grade children, mastering some basic skills can help them solve the problem of Sudoku better and cultivate their logical thinking and mathematical ability.
First, fill in the unique number:
When only one unique number can be filled in a cell, you can fill in the number first to determine the value of the position. For example, there are 1, 2, 4 in a cell, but the other numbers are not determined, so there is only 3 in the cell, and you can fill it in this position.
Second, the exclusion number:
By checking the numbers filled in each cell, row and column, you can eliminate some impossible number options. For example, 1, 2,4 have already appeared in a line, but other numbers have not been determined, so these three numbers can be excluded because they have already appeared in the line.
Third, use the remainder method:
In each cell, after determining the number that has been filled in, you can reason according to the number of remaining numbers. For example, a cell has been filled with 1, 2, 3, but there are still three vacancies left in this cell, so the remaining numbers can only be 4, 5, 6, because 1~3 has already appeared.
Fourth, the trial method:
When the above skills cannot be further advanced, you can use the trial method. Just choose a vacancy, try to fill in a number, and then continue to reason. If you find a contradiction, go back to the previous step and try again. Through continuous trial and error, the problem of Sudoku was finally solved.
It should be noted that for second-grade children, Sudoku is mainly to cultivate their logical thinking and mathematical ability, and does not require them to solve complex problems. Therefore, we should pay attention to cultivating their interest in the teaching process and give them appropriate guidance and help according to their actual level and ability.
In short, by mastering the basic skills of filling in unique numbers, excluding numbers, remainder and trial and error, second-grade children can better solve the problem of Sudoku six grids and improve their logical thinking and mathematical ability. At the same time, we should pay attention to cultivate their interest and practical ability in the teaching process, so that Sudoku can become a way for them to learn and entertain.