题目内容
(1)(
+
-
)×(-12);
(2)-|-32|÷3×(-
)-(-2)3;
(3)(-2)2011+(-2)2012;
(4)2(a2b-2ab2+c)-(2c+3a2b-ab2).
| 5 |
| 12 |
| 2 |
| 3 |
| 3 |
| 4 |
(2)-|-32|÷3×(-
| 1 |
| 3 |
(3)(-2)2011+(-2)2012;
(4)2(a2b-2ab2+c)-(2c+3a2b-ab2).
(1)原式=(-12)×
+(-12)×
-(-12)×
=-5-8+9
=-4;
(2)原式=-9×
×(-
)-(-8)
=1+8
=9;
(3)原式=(-2)2011+(-2)2011×(-2)
=(1-2)×(-2)2011
=(-1)×(-22011)
=-22011;
(4)原式=2a2b-4ab2+2c-2c-3a2b+ab2
=-a2b-3ab2
| 5 |
| 12 |
| 2 |
| 3 |
| 3 |
| 4 |
=-5-8+9
=-4;
(2)原式=-9×
| 1 |
| 3 |
| 1 |
| 3 |
=1+8
=9;
(3)原式=(-2)2011+(-2)2011×(-2)
=(1-2)×(-2)2011
=(-1)×(-22011)
=-22011;
(4)原式=2a2b-4ab2+2c-2c-3a2b+ab2
=-a2b-3ab2
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