题目内容
计算下面各题,能简算的要简算.
(1)
×
-
×
=
(2)
÷30×
=
(1)
| 7 |
| 12 |
| 3 |
| 4 |
| 5 |
| 12 |
| 3 |
| 4 |
(2)
| 17 |
| 18 |
| 10 |
| 17 |
分析:(1)运用乘法的分配律进行计算即可.
(2)运用分数乘除法的计算法则进行计算即可.
(2)运用分数乘除法的计算法则进行计算即可.
解答:解:(1)
×
-
×
=
×(
-
)
=
×
=
;
(2)
÷30×
=
×
×
=
.
| 7 |
| 12 |
| 3 |
| 4 |
| 5 |
| 12 |
| 3 |
| 4 |
=
| 3 |
| 4 |
| 7 |
| 12 |
| 5 |
| 12 |
=
| 3 |
| 4 |
| 1 |
| 6 |
=
| 1 |
| 8 |
(2)
| 17 |
| 18 |
| 10 |
| 17 |
=
| 17 |
| 18 |
| 1 |
| 30 |
| 10 |
| 17 |
=
| 1 |
| 54 |
点评:此题主要考查的是分数乘、除法计算方法和简便运算的灵活应用.
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