题目内容
3
-{2-[0.35÷(1-
)×1
]}×
.
| 2 |
| 15 |
| 3 |
| 8 |
| 2 |
| 3 |
| 1 |
| 8 |
分析:先算小括号里面的减法,再算中括号里面的除法,然后算中括号里面的乘法,再算大括号里面的减法,再算括号外的乘法,最后算括号外的减法.
解答:解:3
-{2-[0.35÷(1-
)×1
]}×
,
=3
-{2-[0.35÷
×1
]}×
,
=3
-{2-[
×
×1
]}×
,
=3
-{2-[
×
]}×
,
=3
-{2-
}×
,
=3
-
×
,
=3
-
,
=3.
| 2 |
| 15 |
| 3 |
| 8 |
| 2 |
| 3 |
| 1 |
| 8 |
=3
| 2 |
| 15 |
| 5 |
| 8 |
| 2 |
| 3 |
| 1 |
| 8 |
=3
| 2 |
| 15 |
| 7 |
| 20 |
| 8 |
| 5 |
| 2 |
| 3 |
| 1 |
| 8 |
=3
| 2 |
| 15 |
| 14 |
| 25 |
| 5 |
| 3 |
| 1 |
| 8 |
=3
| 2 |
| 15 |
| 14 |
| 15 |
| 1 |
| 8 |
=3
| 2 |
| 15 |
| 16 |
| 15 |
| 1 |
| 8 |
=3
| 2 |
| 15 |
| 2 |
| 15 |
=3.
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,然后算大括号里面的,最后算括号外的;本题计算的步骤较多,要细心.
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