题目内容
(
-
)÷
.
| 4 |
| 7 |
| 1 |
| 2 |
| 15 |
| 14 |
分析:先把括号外的除法变成乘法,再运用乘法分配律简算.
解答:解:(
-
)÷
,
=(
-
)×
,
=
×
-
×
,
=
-
,
=
.
| 4 |
| 7 |
| 1 |
| 2 |
| 15 |
| 14 |
=(
| 4 |
| 7 |
| 1 |
| 2 |
| 14 |
| 15 |
=
| 4 |
| 7 |
| 14 |
| 15 |
| 1 |
| 2 |
| 14 |
| 15 |
=
| 8 |
| 15 |
| 7 |
| 15 |
=
| 1 |
| 15 |
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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