题目内容
(
+
+
)×2.4.
| 1 |
| 3 |
| 3 |
| 4 |
| 5 |
| 8 |
分析:运用乘法分配律简算.
解答:解:(
+
+
)×2.4
=
×2.4+
×2.4+
×2.4
=0.8+1.8+1.5
=4.1.
| 1 |
| 3 |
| 3 |
| 4 |
| 5 |
| 8 |
=
| 1 |
| 3 |
| 3 |
| 4 |
| 5 |
| 8 |
=0.8+1.8+1.5
=4.1.
点评:乘法分配律是最常用的简便运算的方法,要熟练掌握,灵活运用.
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