题目内容
29
-1
-15
+3
-2
-13
+0.25.
| 3 |
| 5 |
| 1 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 5 |
分析:根据加法交换律和结合律进行计算即可.
解答:解:
29
-1
-15
+3
-2
-13
+0.25,
=(29
-13
)-(15
-0.25)+(3
-2
-1
),
=16
-15+0,
=1
.
29
| 3 |
| 5 |
| 1 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 5 |
=(29
| 3 |
| 5 |
| 2 |
| 5 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
=16
| 1 |
| 5 |
=1
| 1 |
| 5 |
点评:四则运算,先弄清运算顺序,然后再进行计算,能简算的要简算.
练习册系列答案
相关题目