题目内容
计算:(1)-22×0.125-[4÷(-
)2-
]+(-1)2011
(2)[1
-(
+
-
)×24]÷5
| 2 |
| 3 |
| 1 |
| 2 |
(2)[1
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
分析:(1)有乘方运算,应首先算出乘方,再算括号里面的,再进行乘除运算,最后算加减.
(2)虽然有括号,但是(
+
-
)×24,利用乘法分配律算出比较简单,所以应先去括号再进行运算.
(2)虽然有括号,但是(
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
解答:解:(1)-22×0.125-[4÷(-
)2-
]+(-1)2011,
=-4×0.125-(4×
-
)-1,
=-
-
-1,
=-10;
(2)[1
-(
+
-
)×24]÷5,
=[
-(
×24+
×24-
×24]÷5,
=(
-9-4+18)÷5,
=
×
,
=
.
| 2 |
| 3 |
| 1 |
| 2 |
=-4×0.125-(4×
| 9 |
| 4 |
| 1 |
| 2 |
=-
| 1 |
| 2 |
| 17 |
| 2 |
=-10;
(2)[1
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
=[
| 5 |
| 4 |
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
=(
| 5 |
| 4 |
=
| 25 |
| 4 |
| 1 |
| 5 |
=
| 5 |
| 4 |
点评:此题主要考查了有理数的运算,正确的掌握运算顺序,是解决此问题的关键.
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