题目内容
| 5 |
| 8 |
| 3 |
| 17 |
| 3 |
| 8 |
分析:根据题意,运用加法交换律进行简算.
解答:解:
-
+
,
=
+
-
,
=1-
,
=
.
故选:C、D.
| 5 |
| 8 |
| 3 |
| 17 |
| 3 |
| 8 |
=
| 5 |
| 8 |
| 3 |
| 8 |
| 3 |
| 17 |
=1-
| 3 |
| 17 |
=
| 14 |
| 17 |
故选:C、D.
点评:此题主要考查分数的加减混合运算的运算顺序和应用运算定律进行简便计算.
练习册系列答案
相关题目
题目内容
| 5 |
| 8 |
| 3 |
| 17 |
| 3 |
| 8 |
| 5 |
| 8 |
| 3 |
| 17 |
| 3 |
| 8 |
| 5 |
| 8 |
| 3 |
| 8 |
| 3 |
| 17 |
| 3 |
| 17 |
| 14 |
| 17 |