问题
解答题
(1)(
(2)-|-32|÷3×(-
(3)(-2)2011+(-2)2012; (4)2(a2b-2ab2+c)-(2c+3a2b-ab2). |
答案
(1)原式=(-12)×
+(-12)×5 12
-(-12)×2 3 3 4
=-5-8+9
=-4;
(2)原式=-9×
×(-1 3
)-(-8)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