题目内容
[
-(
+
)]÷
=
．
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
| 3 |
| 4 |
| 5 |
| 9 |
| 5 |
| 9 |
分析：中括号内可运用减法的性质以及加法交换律计算，然后再算括号外的除法．
解答：解：[
-（
+
）]÷
=[
-
-
]÷
=[
-
]÷
=
×
=
故答案为：
．
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
| 3 |
| 4 |
=[
| 5 |
| 6 |
| 1 |
| 6 |
| 1 |
| 4 |
| 3 |
| 4 |
=[
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 5 |
| 12 |
| 4 |
| 3 |
=
| 5 |
| 9 |
故答案为：
| 5 |
| 9 |
点评：注意运算顺序和运算法则，灵活运用所学的运算律简便计算．
练习册系列答案
相关题目