题目内容
用简便方法计算
①0.58+
+1.12+
②11-
-
.
①0.58+
| 5 |
| 13 |
| 8 |
| 13 |
②11-
| 4 |
| 11 |
| 7 |
| 11 |
分析:①运用加法交换律与结合律简算;
②运用减法的性质简算.
②运用减法的性质简算.
解答:解:①0.58+
+1.12+
,
=(0.58+1.12)+(
+
),
=1.7+1,
=2.7;
②11-
-
,
=11-(
+
),
=11-1,
=10.
| 5 |
| 13 |
| 8 |
| 13 |
=(0.58+1.12)+(
| 5 |
| 13 |
| 8 |
| 13 |
=1.7+1,
=2.7;
②11-
| 4 |
| 11 |
| 7 |
| 11 |
=11-(
| 4 |
| 11 |
| 7 |
| 11 |
=11-1,
=10.
点评:此题属于简算的题目,要注意分析式中数据,运用合适的简便方法计算.
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