题目内容
计算.
12÷
÷
27÷
÷
.
12÷
| 4 |
| 5 |
| 3 |
| 8 |
27÷
| 3 |
| 13 |
| 26 |
| 9 |
分析:通过观察,这两道题都应先把除法改为乘法,然后约分计算.
解答:解:(1)12÷
÷
,
=12×
×
,
=40;
(2)27÷
÷
,
=27×
×
,
=
.
| 4 |
| 5 |
| 3 |
| 8 |
=12×
| 5 |
| 4 |
| 8 |
| 3 |
=40;
(2)27÷
| 3 |
| 13 |
| 26 |
| 9 |
=27×
| 13 |
| 3 |
| 9 |
| 26 |
=
| 81 |
| 2 |
点评:先进行乘除法转化,通过约分进行简算.
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