Vertical · Série 33

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