题目内容
2005×
-1949÷2
+3
×10.4.
| 3 |
| 8 |
| 2 |
| 3 |
| 3 |
| 4 |
分析:1949÷2
=1949×
,然后根据乘法分配律进行简算.
| 2 |
| 3 |
| 8 |
| 3 |
解答:解:2005×
-1949÷2
+3
×10.4,
=2005×
-1949×
+3
×10.4,
=(2005-1949)×
+3
×10.4,
=56×
+3
×10.4,
=21+39,
=60.
| 3 |
| 8 |
| 2 |
| 3 |
| 3 |
| 4 |
=2005×
| 3 |
| 8 |
| 8 |
| 3 |
| 3 |
| 4 |
=(2005-1949)×
| 8 |
| 3 |
| 3 |
| 4 |
=56×
| 8 |
| 3 |
| 3 |
| 4 |
=21+39,
=60.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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