题目内容
| 6 |
| 7 |
| 6 |
| 7 |
| 2 |
| 3 |
| 1 |
| 9 |
分析:先计算括号内部的,然后运用乘法的分配律进行计算即可.
解答:解:
-
×(
+
),
=
-
×(
+
),
=
×(1-
),
=
×
,
=
.
| 6 |
| 7 |
| 6 |
| 7 |
| 2 |
| 3 |
| 1 |
| 9 |
=
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
| 9 |
| 1 |
| 9 |
=
| 6 |
| 7 |
| 7 |
| 9 |
=
| 6 |
| 7 |
| 2 |
| 9 |
=
| 4 |
| 21 |
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
练习册系列答案
相关题目