题目内容
73.66+
+26.34+
+
.
| 5 |
| 27 |
| 1 |
| 5 |
| 2 |
| 5 |
分析:通过观察,此题运用加法交换律与结合律简算.
解答:解:73.66+
+26.34+
+
,
=(73.66+26.34)+
+(
+
),
=100+(
+
),
=100+
,
=100
.
| 5 |
| 27 |
| 1 |
| 5 |
| 2 |
| 5 |
=(73.66+26.34)+
| 5 |
| 27 |
| 1 |
| 5 |
| 2 |
| 5 |
=100+(
| 5 |
| 27 |
| 3 |
| 5 |
=100+
| 106 |
| 135 |
=100
| 106 |
| 135 |
点评:此题是考查四则混合运算,要仔细观察算式的特点,灵活运用一些定律进行简便计算.
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