题目内容
| 4 |
| 5 |
| 3 |
| 5 |
| 1 |
| 4 |
| 7 |
| 10 |
分析:先算小括号里面的减法,再算中括号里面的除法,最后算括号外的除法.
解答:解:
÷[(
-
)÷
],
=
÷[
÷
],
=
÷
,
=
.
| 4 |
| 5 |
| 3 |
| 5 |
| 1 |
| 4 |
| 7 |
| 10 |
=
| 4 |
| 5 |
| 7 |
| 20 |
| 7 |
| 10 |
=
| 4 |
| 5 |
| 1 |
| 2 |
=
| 8 |
| 5 |
点评:一个算式里,如果有多层括号,要先算小括号里的,再算中括号里面的,最后算大括号里面的.
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