10 的加减法
10
10
10
10
10
10
5 6 3
8 4 1
5
2
7
6
4
9
9 + 1 = 10
1 + 9 = 10
10 - 1 = 9
10 - 9 = 1
8 + 2 = 10
2 + 8 = 10
10 - 8 = 2
10 - 2 = 8
7 + 3 = 10
3 + 7 = 10
10 - 7 = 3
10 - 3 = 7
6 + 4 = 10
4 + 6 = 10
10 - 6 = 4
10 - 4 = 6
5 + 5 = 10
10 - 5 = 5
2
4
6
8
10
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