题目内容
计算:2.5×(
-
)+3
.
| 2 |
| 3 |
| 2 |
| 5 |
| 1 |
| 6 |
分析:根据分数的四则混合运算的顺序进行计算即可得到答案.
解答:解:2.5×(
-
)+3
=2.5×
+3
,
=
×
+3
,
=
+3
,
=3
.
| 2 |
| 3 |
| 2 |
| 5 |
| 1 |
| 6 |
=2.5×
| 4 |
| 15 |
| 1 |
| 6 |
=
| 5 |
| 2 |
| 4 |
| 15 |
| 1 |
| 6 |
=
| 2 |
| 3 |
| 1 |
| 6 |
=3
| 5 |
| 6 |
点评:此题主要考查的是分数的四则混合运算的运算顺序.
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