十の位 · セット 9

20 problems
1
2 - 1 =
2
5 - 4 =
3
7 - 5 =
4
4 - 2 =
5
8 - 7 =
6
4 - 1 =
7
2 - 1 =
8
4 - 2 =
9
4 - 3 =
10
8 - 2 =
11
3 - 1 =
12
6 - 1 =
13
7 - 6 =
14
5 - 2 =
15
4 - 1 =
16
2 - 1 =
17
3 - 1 =
18
6 - 4 =
19
6 - 3 =
20
5 - 4 =
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