题目内容
| 3 |
| 4 |
| 1 |
| 4 |
| 5 |
| 12 |
分析:此题应按运算顺序进行计算,先算括号里的,再算乘法和除法,最后算加法.
解答:解:
×(2.5-
)+
÷0.25,
=
×(
-
)+
÷
,
=
×
+
×4,
=
+
,
=
+
=
,
=3
.
| 3 |
| 4 |
| 1 |
| 4 |
| 5 |
| 12 |
=
| 3 |
| 4 |
| 10 |
| 4 |
| 1 |
| 4 |
| 5 |
| 12 |
| 1 |
| 4 |
=
| 3 |
| 4 |
| 9 |
| 4 |
| 5 |
| 12 |
=
| 27 |
| 16 |
| 5 |
| 3 |
=
| 81 |
| 48 |
| 80 |
| 48 |
=
| 161 |
| 48 |
=3
| 17 |
| 48 |
点评:此题重点考查学生对四则混合运算顺序的掌握情况,以及运算能力.
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