题目内容
| 2 |
| 3 |
| 2 |
| 3 |
| 5 |
| 7 |
分析:按照先算括号里面的加法,再按照从左到右顺序即可解答.
解答:解:
+4-(
+
),
=
+4-1
,
=4
-1
,
=3
.
| 2 |
| 3 |
| 2 |
| 3 |
| 5 |
| 7 |
=
| 2 |
| 3 |
| 8 |
| 21 |
=4
| 2 |
| 3 |
| 8 |
| 21 |
=3
| 2 |
| 7 |
点评:依据四则运算顺序正确进行计算,是本题考查知识点.
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| 2 |
| 3 |
| 2 |
| 3 |
| 5 |
| 7 |
| 2 |
| 3 |
| 2 |
| 3 |
| 5 |
| 7 |
| 2 |
| 3 |
| 8 |
| 21 |
| 2 |
| 3 |
| 8 |
| 21 |
| 2 |
| 7 |