subtraction/without-borrowing/expert · 세트 64

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