题目内容

计算:
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
4
9
÷
3
8
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


4
9
÷
3
8

=
8
3
÷
3
8

=7
1
9
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