题目内容
计算下列各题:(1)-0.52+
| 1 |
| 4 |
| 1 |
| 2 |
| 4 |
| 9 |
(2)-1
| 2 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
分析:此题的两个小题都是有理数的混合运算,首先计算括号里面的,然后按照先乘方,然后乘除法,然后加减计算即可求出结果.
解答:解:(1)-0.52+
-|-22-4|-(-1
)3×
=-
+
-8+
=-6.5;
(2)-1
÷
×(-0.6)×1
+(-2)3.
=
×
×
×
-8
=-
.
| 1 |
| 4 |
| 1 |
| 2 |
| 4 |
| 9 |
=-
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 2 |
=-6.5;
(2)-1
| 2 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
=
| 5 |
| 3 |
| 4 |
| 3 |
| 3 |
| 5 |
| 7 |
| 4 |
=-
| 17 |
| 3 |
点评:此题主要考查了有理数的混合运算,注意运算顺序与运算符号,本题应先算括号,再计算乘法、除法,最后计算加减.
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