十の位 · セット 40

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