1桁の足し算と引き算虫食い
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7 - 6 = 1 8 - 8 = 0
6 - 6 = 0 5 - 4 = 1
1 + 0 = 1 7 + 0 = 7
8 + 9 = 17 8 + 7 = 15
2 + 8 = 10 9 + 1 = 10
3 - 2 = 1 9 - 4 = 5
1 + 3 = 4 4 + 3 = 7
1 - 1 = 0 9 - 6 = 3
5 - 3 = 2 6 - 0 = 6
7 - 1 = 6 6 + 6 = 12
7 + 8 = 15 7 - 1 = 6
2 + 5 = 7 5 + 1 = 6
3 + 8 = 11 9 - 1 = 8
4 - 2 = 2 5 + 5 = 10
2 - 0 = 2 3 + 8 = 11
8 - 8 = 0 7 - 7 = 0
3 - 1 = 2 2 - 0 = 2
1 - 1 = 0 1 + 0 = 1
4 - 0 = 4 3 - 3 = 0
3 + 5 = 8 6 - 4 = 2
9 - 2 = 7 1 - 0 = 1
4 - 1 = 3 3 - 0 = 3
2 + 6 = 8 1 + 0 = 1
7 + 1 = 8 2 + 9 = 11
7 + 7 = 14 5 + 2 = 7
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