题目内容
用递等式计算
|
15÷
|
| ||||||||||||||||
3×
|
|
|
分析:依据分数乘除法计算法则计算方法解答.
解答:解:(1)
×18×
,
=4×
,
=3;
(2)15÷
×
,
=
×
,
=10;
(3)
×
÷
×
,
=
÷
×
,
=
×
,
=
;
(4)3×
÷
,
=
÷
,
=3
;
(5)
÷
÷
,
=
÷
,
=
;
(6)
÷
×
,
=
×
,
=
.
| 2 |
| 9 |
| 3 |
| 4 |
=4×
| 3 |
| 4 |
=3;
(2)15÷
| 9 |
| 10 |
| 3 |
| 5 |
=
| 50 |
| 3 |
| 3 |
| 5 |
=10;
(3)
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
=
| 1 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
=
| 1 |
| 2 |
| 1 |
| 2 |
=
| 1 |
| 4 |
(4)3×
| 4 |
| 9 |
| 3 |
| 8 |
=
| 4 |
| 3 |
| 3 |
| 8 |
=3
| 5 |
| 9 |
(5)
| 5 |
| 8 |
| 7 |
| 12 |
| 10 |
| 7 |
=
| 15 |
| 14 |
| 10 |
| 7 |
=
| 3 |
| 4 |
(6)
| 7 |
| 10 |
| 8 |
| 9 |
| 5 |
| 21 |
=
| 63 |
| 80 |
| 5 |
| 21 |
=
| 3 |
| 16 |
点评:本题主要考查学生对于分数乘除法计算方法掌握,注意约分使计算简便.
练习册系列答案
相关题目