题目内容
小小会计师(用你喜欢的方法计算).
|
25÷
|
|
|
分析:(1)(2)(3)把除法变为乘法,约分计算;
(4)直接约分计算.
(4)直接约分计算.
解答:解:(1)
×
÷
,
=
×
×
,
=
;
(2)25÷
÷
,
=25×
×
,
=48;
(3)
÷
×
,
=
×
×
,
=
;
(4)
×
×
=
.
| 5 |
| 6 |
| 14 |
| 3 |
| 28 |
| 9 |
=
| 5 |
| 6 |
| 14 |
| 3 |
| 9 |
| 28 |
=
| 5 |
| 4 |
(2)25÷
| 5 |
| 8 |
| 5 |
| 6 |
=25×
| 8 |
| 5 |
| 6 |
| 5 |
=48;
(3)
| 4 |
| 7 |
| 6 |
| 5 |
| 7 |
| 15 |
=
| 4 |
| 7 |
| 5 |
| 6 |
| 7 |
| 15 |
=
| 2 |
| 9 |
(4)
| 27 |
| 4 |
| 10 |
| 9 |
| 5 |
| 27 |
| 25 |
| 18 |
点评:本题考查了学生通过约分对分数四则混合运题目进行简算的能力.
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