题目内容
(2012?广州模拟)1
×(1
+2.5)-0.65÷ 2
.
| 4 |
| 5 |
| 2 |
| 3 |
| 1 |
| 6 |
分析:本题先计算括号内部的再计算括号外面的,按照分数的四则混合运算顺序及法则进行解答.
解答:解:1
×(1
+2.5)-0.65÷2
=
×(
+
)-0.65÷
,
=
×(
+
)-0.65×
,
=
×
-0.65×
,
=
-
×
,
=7.5-0.3,
=7.2.
| 4 |
| 5 |
| 2 |
| 3 |
| 1 |
| 6 |
=
| 9 |
| 5 |
| 5 |
| 3 |
| 5 |
| 2 |
| 13 |
| 6 |
=
| 9 |
| 5 |
| 10 |
| 6 |
| 15 |
| 6 |
| 6 |
| 13 |
=
| 9 |
| 5 |
| 25 |
| 6 |
| 6 |
| 13 |
=
| 15 |
| 2 |
| 13 |
| 20 |
| 6 |
| 13 |
=7.5-0.3,
=7.2.
点评:本题主要考查了分数的四则混合运算的顺序及法则的掌握情况.
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