题目内容

计算:
1÷
2
7
÷
1
4
1
4
÷
7
8
÷
7
9
3
8
÷12÷
5
8
7
15
×
5
3
÷
10
9
5
8
×
2
5
÷
3
4
6×
4
9
÷
3
8
.
1÷
2
7
÷
1
4
,
=
7
2
÷
1
4
,
=14;

1
4
÷
7
8
÷
7
9
,
=
2
7
÷
7
9
,
=
18
49
;

3
8
÷12÷
5
8
,
=
1
32
÷
5
8
,
=
1
20
;

7
15
×
5
3
÷
10
9
,
=
7
9
÷
10
9
,
=
7
10
;

5
8
×
2
5
÷
3
4
,
=
1
4
÷
3
4
,
=
1
3
;

6×
4
9
÷
3
8
,
=
8
3
÷
3
8
,
=7
1
9
.
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