题目内容
(1)-2÷
-
÷2×
;
(2)-
×|-1+(-5)|-12×(
-
+
).
| 1 |
| 0.52 |
| 4 |
| -32 |
| 1 |
| 2 |
(2)-
| 1 |
| 3 |
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 4 |
考点:有理数的混合运算
专题:
分析:(1)先算乘方,再算乘除,最后算减法;
(2)先算绝对值,后面的乘法利用乘法分配律简算,再算乘法,最后算减法.
(2)先算绝对值,后面的乘法利用乘法分配律简算,再算乘法,最后算减法.
解答:解:(1)原式=-2÷
-
×
×
=-
+
=-
;
(2)原式=-
×6-(12×
-12×
+12×
)
=-2-(2-8+3)
=-2-(-3)
=-2+3
=1.
| 1 |
| 0.25 |
| 4 |
| -9 |
| 1 |
| 2 |
| 1 |
| 2 |
=-
| 1 |
| 2 |
| 1 |
| 9 |
=-
| 7 |
| 18 |
(2)原式=-
| 1 |
| 3 |
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 4 |
=-2-(2-8+3)
=-2-(-3)
=-2+3
=1.
点评:此题考查有理数的混合运算,注意运算顺序与符号的判定.
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