问题
解答题
计算: (1)(-
(2)(-2xy)2-3x2y3÷(-x3y4) (3)(2b+2)2-(2b+2)(2b-2) (4)0.1252008×82009. |
答案
(1)原式=1-2-3+4
=0;
(2)原式=4x2y2-3x2y3÷(-x3y4)
=4x2y2+
;3 xy
(3)原式=4b2+8b+4-4b2+4
=8b+8;
(4)原式=(0.125×8)2008×8
=1×8
=8.