题目内容
计算:
(1)4-6÷(-2)×(-
)
(2)|-5-4|-
×
÷(-
)
(3)(
-
-
)×(-48)(用简便方法计算)
(4)(
)2+
-
+|2-
|
(5)-32-[(
)2÷(-1)-
]×(-
)÷(-1)3
(6)(-
)×(-42)-0.25×(-8)×(-1)2007.
(1)4-6÷(-2)×(-
| 1 |
| 3 |
(2)|-5-4|-
| 25 |
| 3 | -64 |
| 1 |
| 2 |
(3)(
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 8 |
(4)(
| 7 |
| (-7)2 |
| 7 |
| 7 |
(5)-32-[(
| 1 |
| 2 |
| 1 |
| 16 |
| 4 |
(6)(-
| 5 |
| 8 |
(1)原式=4+3×(-
)=4-1=3;
(2)原式=9-5×(-4)×(-2)=9-40=-31;
(3)原式=
×(-48)-
×(-48)-
×(-48)=-32+12+18=-2;
(4)原式=7+7-
+
-2=12;
(5)原式=-9-(-
)×(-2)÷(-1)=-9+
=-8
;
(6)原式=10+2=12.
| 1 |
| 3 |
(2)原式=9-5×(-4)×(-2)=9-40=-31;
(3)原式=
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 8 |
(4)原式=7+7-
| 7 |
| 7 |
(5)原式=-9-(-
| 5 |
| 16 |
| 5 |
| 8 |
| 3 |
| 8 |
(6)原式=10+2=12.
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