题目内容
5.58-
+5.42-
.
| 3 |
| 5 |
| 2 |
| 5 |
分析:本题可据交换律及结合律进行简算.
解答:解:5.58-
+5.42-
,
=(5.58+5.42)-(
+
),
=11-1,
=10.
| 3 |
| 5 |
| 2 |
| 5 |
=(5.58+5.42)-(
| 3 |
| 5 |
| 2 |
| 5 |
=11-1,
=10.
点评:本题考查了学生对于加法交换律及结合律的运用.
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