Daliang experimental primary school draws lots.

In the knockout stage, 10 people draw lots according to the position of 16.

In the first round, six people had a bye, and the remaining four played two games.

There are eight people left to play four games in the second round.

There are four people left to play two games in the third round.

Final round 1.

2+4+2+ 1=9

Extended data:

Add operation

1, add two numbers with the same sign, take the same sign as the addend, and add the absolute values.

2. Add two numbers with different signs. If the absolute values are equal, the sum of two numbers with opposite numbers is 0; If the absolute values are not equal, take the sign of the addend with the larger absolute value and subtract the smaller absolute value from the larger absolute value.

3. Add two numbers with opposite numbers to get 0.

4. Adding a number to 0 still gets this number.

You can add two opposite numbers first.

6. Numbers with the same sign can be added first.

7. Numbers with the same denominator can be added first.

8. If several numbers can be added to get an integer, they can be added first.

subtraction

Subtracting a number is equivalent to adding the reciprocal of this number, that is, the subtraction of rational numbers is converted into addition.