subtraction/without-borrowing/expert · 套题 99
20 problems
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班级:
日期:
1
2 - 1
=
2
9 - 4
=
3
8 - 3
=
4
6 - 2
=
5
6 - 1
=
6
3 - 1
=
7
2 - 1
=
8
8 - 5
=
9
2 - 1
=
10
3 - 1
=
11
8 - 7
=
12
6 - 3
=
13
6 - 3
=
14
2 - 1
=
15
5 - 3
=
16
9 - 5
=
17
9 - 5
=
18
6 - 3
=
19
4 - 3
=
20
7 - 5
=