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