题目内容
| 11 |
| 6 |
| 6 |
| 7 |
| 2 |
| 7 |
| 11 |
| 6 |
| 1 |
| 7 |
| 6 |
| 11 |
分析:先把除法变成乘法,然后使用乘法分配律简算.
解答:解:
×4
+3
×
-5
÷
,
=
×4
+3
×
-5
×
,
=
×(4
+3
-5
),
=
×3,
=
.
| 11 |
| 6 |
| 6 |
| 7 |
| 2 |
| 7 |
| 11 |
| 6 |
| 1 |
| 7 |
| 6 |
| 11 |
=
| 11 |
| 6 |
| 6 |
| 7 |
| 2 |
| 7 |
| 11 |
| 6 |
| 1 |
| 7 |
| 11 |
| 6 |
=
| 11 |
| 6 |
| 6 |
| 7 |
| 2 |
| 7 |
| 1 |
| 7 |
=
| 11 |
| 6 |
=
| 11 |
| 2 |
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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