问题 解答题
5
7
÷
5
8
5
7
×
5
8
5
6
÷
3
4
5
6
×
3
4
120÷
3
4
120×
3
4
7
12
÷21
7
12
×21.
答案

5
7
÷
5
8
=
8
7
5
7
×
5
8
=
25
56
5
6
÷
3
4
=
10
9
5
6
×
3
4
=
5
8
120÷
3
4
=160,
120×
3
4
=90,
7
12
÷21=
1
36
7
12
×21=
49
4

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