1桁の足し算と20までの引き算虫食い
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9 - 1 = 8 1 + 5 = 6
1 + 0 = 1 6 + 2 = 8
3 - 2 = 1 2 + 2 = 4
2 + 7 = 9 5 - 2 = 3
2 - 2 = 0 7 + 4 = 11
2 - 1 = 1 2 + 5 = 7
6 + 1 = 7 4 - 1 = 3
4 + 2 = 6 6 - 5 = 1
2 + 8 = 10 2 + 9 = 11
9 - 3 = 6 3 - 1 = 2
5 + 8 = 13 5 - 1 = 4
1 - 0 = 1 9 + 3 = 12
4 - 4 = 0 6 + 4 = 10
2 + 0 = 2 1 + 4 = 5
3 - 1 = 2 1 + 1 = 2
7 - 6 = 1 6 + 7 = 13
2 - 2 = 0 6 + 2 = 8
3 + 3 = 6 1 - 0 = 1
4 - 2 = 2 3 - 1 = 2
2 - 2 = 0 7 - 0 = 7
6 + 6 = 12 5 + 6 = 11
4 + 0 = 4 3 + 6 = 9
6 - 2 = 4 4 - 2 = 2
8 + 6 = 14 6 - 5 = 1
8 + 6 = 14 3 + 8 = 11
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