题目内容

计算下面各题.
7
12
×21×
3
10
4
9
÷5×
5
6
7
8
÷
3
4
÷
7
12
8
5
÷
5
9
÷24
4
3
×
1
8
÷8.
(1)
7
12
×21×
3
10

=
7
12
×
3
10
×21
=
7
40
×21
=
147
40


(2)
4
9
÷5×
5
6

=
4
9
×
1
5
×
5
6

2
27


(3)
7
8
÷
3
4
÷
7
12

=
7
8
×
4
3
×
12
7

=2;

(4)
8
5
÷
5
9
÷24
=
8
5
×
9
5
×
1
24

=
3
25


(5)
4
3
×
1
8
÷8
=
4
3
×
1
8
×
1
8

=
1
48
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