题目内容
(
+
+
)÷
.
| 1 |
| 2 |
| 2 |
| 3 |
| 5 |
| 6 |
| 1 |
| 12 |
分析:先把除法变成乘法,再运用乘法分配律简算.
解答:解:(
+
+
)÷
,
=(
+
+
)×12,
=
×12+
×12+
×12,
=6+8+10,
=24.
| 1 |
| 2 |
| 2 |
| 3 |
| 5 |
| 6 |
| 1 |
| 12 |
=(
| 1 |
| 2 |
| 2 |
| 3 |
| 5 |
| 6 |
=
| 1 |
| 2 |
| 2 |
| 3 |
| 5 |
| 6 |
=6+8+10,
=24.
点评:乘法分配律是常用的简便运算的方法,要熟练掌握,灵活运用.
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