精英家教网 > 小学数学 > 题目详情
14
11
÷21
5
8
÷
5
6
8
9
÷
3
7
9
46
×
11
12
÷
22
23
40
7
÷5×
5
2
8
5
÷(
3
5
-
1
3
)
分析:(1)--(5)题,把除法变为乘法,约分计算;
(6)题,先算括号内的,再算括号外的.
解答:解:(1)
14
11
÷21
=
14
11
×
1
21

=
2
33


(2)
5
8
÷
5
6

=
5
8
×
6
5

=
3
4


(3)
8
9
÷
3
7

=
8
9
×
7
3

=
56
27


(4)
9
46
×
11
12
÷
22
23

=
9
46
×
11
12
×
23
22

=
3
16


(5)
40
7
÷5×
5
2

=
40
7
×
1
5
×
5
2

=
20
7


(6)
8
5
÷(
3
5
-
1
3

=
8
5
÷
4
15

=
8
5
×
15
4

=6
点评:此题主要考查分数计算中乘除法的转化,以及运用约分进行简算.
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