1桁の足し算と引き算虫食い
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2 + 3 = 5 7 - 4 = 3
2 + 9 = 11 9 + 9 = 18
8 + 9 = 17 8 - 0 = 8
8 + 7 = 15 5 - 1 = 4
7 - 3 = 4 1 + 4 = 5
7 - 0 = 7 9 - 0 = 9
1 + 1 = 2 7 + 7 = 14
7 + 4 = 11 5 - 5 = 0
2 + 9 = 11 4 - 4 = 0
3 - 0 = 3 9 - 4 = 5
3 - 2 = 1 5 + 7 = 12
7 - 7 = 0 5 - 1 = 4
7 + 6 = 13 2 + 8 = 10
6 - 1 = 5 8 + 7 = 15
5 - 2 = 3 1 - 1 = 0
9 + 6 = 15 2 - 1 = 1
7 + 1 = 8 8 - 2 = 6
5 + 8 = 13 5 + 3 = 8
4 - 1 = 3 2 - 1 = 1
9 + 4 = 13 1 - 1 = 0
5 - 5 = 0 4 + 7 = 11
2 + 7 = 9 8 - 2 = 6
2 + 2 = 4 5 + 1 = 6
9 - 3 = 6 7 - 2 = 5
4 - 1 = 3 7 - 4 = 3
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