6 -4 -2

-8 0 8

2 4 -6

This kind of problem is easy to do. First of all, the numbers given are all odd and regular.

For example, fill 1, 2, 3, 4, 5, 6, 7, 8, 9 in the grid, so that the sum of three numbers in each row, three numbers in each column and three numbers diagonally equals 15.

2 7 6

9 5 1

4 3 8

For example, -4, -3, -2,-1, 0, 1, 2, 3, 4 are filled in the grid, so that the sum of three numbers in each row, three numbers in each column and three numbers on the diagonal is equal to 0.

-3 2 1

4 0 -4

- 1 -2 3

Look at these three questions carefully. What are the rules? If you really don't understand, ask me again.