题目内容
计算:
÷(2.5-
)+
×3
.
| 3 |
| 4 |
| 1 |
| 4 |
| 5 |
| 12 |
| 1 |
| 5 |
分析:可根据分数的四则混合运算顺序进行计算即可得到答案.
解答:解:
÷(2.5-
)+
×3
=
÷(
-
)+
×
,
=
÷
+
×
,
=
+
,
=1
.
| 3 |
| 4 |
| 1 |
| 4 |
| 5 |
| 12 |
| 1 |
| 5 |
=
| 3 |
| 4 |
| 5 |
| 2 |
| 1 |
| 4 |
| 5 |
| 12 |
| 16 |
| 5 |
=
| 3 |
| 4 |
| 9 |
| 4 |
| 5 |
| 12 |
| 16 |
| 5 |
=
| 1 |
| 3 |
| 4 |
| 3 |
=1
| 2 |
| 3 |
点评:此题主要考查的是分数的四则混合运算.
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