题目内容
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 3 |
考点:分数的简便计算
专题:运算定律及简算
分析:逆用乘法分配律,把算式改写成
×(
+
-25%),从而计算得解.
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
解答:
解:
×
+
×
-
×25%
=
×(
+
-25%)
=
×
=
.
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 3 |
=
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
=
| 1 |
| 3 |
| 5 |
| 12 |
=
| 5 |
| 36 |
点评:此题考查分数的简便计算,根据算式中数据的特点,灵活运用乘法分配律进行简算.
练习册系列答案
相关题目