1桁の足し算と20までの引き算虫食い
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7 - 0 = 7 3 - 3 = 0
8 - 6 = 2 8 + 5 = 13
9 + 8 = 17 5 - 3 = 2
2 + 8 = 10 2 - 1 = 1
5 + 3 = 8 2 - 2 = 0
6 + 5 = 11 7 - 5 = 2
8 - 4 = 4 9 - 4 = 5
9 + 4 = 13 9 + 5 = 14
4 - 4 = 0 7 + 6 = 13
8 - 6 = 2 6 + 7 = 13
3 - 0 = 3 9 - 7 = 2
7 - 4 = 3 3 - 2 = 1
6 + 2 = 8 2 + 6 = 8
5 - 4 = 1 9 + 9 = 18
2 - 2 = 0 8 + 0 = 8
6 + 7 = 13 5 + 7 = 12
1 + 4 = 5 2 - 0 = 2
8 + 8 = 16 5 + 0 = 5
2 - 2 = 0 5 - 4 = 1
9 - 4 = 5 3 - 2 = 1
3 - 2 = 1 4 + 2 = 6
3 + 8 = 11 3 - 0 = 3
5 - 5 = 0 9 + 3 = 12
3 - 2 = 1 6 - 1 = 5
2 + 2 = 4 9 - 9 = 0
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