1桁の足し算と引き算虫食い
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6 - 4 = 2 1 - 1 = 0
8 - 4 = 4 7 + 6 = 13
3 + 1 = 4 8 + 6 = 14
6 - 0 = 6 3 + 2 = 5
2 + 6 = 8 9 + 4 = 13
7 - 4 = 3 3 - 3 = 0
6 - 0 = 6 8 - 1 = 7
3 - 2 = 1 7 - 5 = 2
2 - 1 = 1 8 + 7 = 15
1 + 3 = 4 2 + 6 = 8
7 - 6 = 1 9 + 7 = 16
4 - 0 = 4 4 + 3 = 7
4 - 2 = 2 4 + 5 = 9
2 + 1 = 3 4 - 2 = 2
6 - 6 = 0 8 - 6 = 2
4 + 0 = 4 1 + 2 = 3
6 - 1 = 5 3 - 2 = 1
3 + 6 = 9 8 + 7 = 15
3 + 1 = 4 2 - 0 = 2
2 - 0 = 2 3 + 7 = 10
3 - 1 = 2 9 + 1 = 10
8 + 7 = 15 1 - 1 = 0
2 - 2 = 0 6 - 2 = 4
4 - 3 = 1 1 + 5 = 6
7 - 6 = 1 7 - 0 = 7
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