百位 · 套题 6

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