The upper left and upper right circles are filled with two opposite numbers that are not 0 and 5.

Fill in the circles at the lower left and right so that the sum of diagonal directions is 5.

The following figure

Because this problem is a math problem in the first volume of the first grade of primary school, it should not involve negative numbers or decimals, because there is 0, 1+2+3=6 in the picture, that is, the above three numbers can only be filled in, 1, 2, 3, and its sum can only be 6 but not 5, so there is no answer to this problem.