题目内容
7÷
+5×
.
| 4 |
| 3 |
| 3 |
| 4 |
分析:把除法转化为乘法,根据数字特点,运用乘法分配律简算.
解答:解:7÷
+5×
,
=7×
+5×
,
=(7+5)×
,
=12×
,
=9.
| 4 |
| 3 |
| 3 |
| 4 |
=7×
| 3 |
| 4 |
| 3 |
| 4 |
=(7+5)×
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
点评:此题解答的关键是通过乘除法的相互转化,运用运算定律进行简算.
练习册系列答案
相关题目
题目内容
| 4 |
| 3 |
| 3 |
| 4 |
| 4 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |