题目内容
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 13 |
分析:先算小括号里面的加法,再算中括号里面的乘法,最后算除法.
解答:解:
÷[(
+
)×
],
=
÷[
×
],
=
÷
,
=5.
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 13 |
=
| 1 |
| 3 |
| 13 |
| 15 |
| 1 |
| 13 |
=
| 1 |
| 3 |
| 1 |
| 15 |
=5.
点评:一个算式里,如果有括号,要先算小括号里的,再算中括号里面的,最后算括号外的.
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