(1)(3xy2)-(-2xy) (2)(-2)2-20100+2-2(3)(2x2y)3-(-7xy2)÷(14x4y3)
题型:解答题难度:一般来源:不详
(1)(3xy2)-(-2xy) (2)(-2)2-20100+2-2 (3)(2x2y)3-(-7xy2)÷(14x4y3) |
答案
(1)原式=-6x2y3.
(2)原式=4-1+ =3;
(3)原式=8x6y3•(-7xy2)÷(14x4y3) =-56x7y5÷(14x4y3) =-4x3y2. |
举一反三
计算 (1)-22+()-2-|π-3|0+ (2 )272-46×27+232(简便运算) (3)(x-2)(x-3)-(x-2)2 (4)(2x+1)2(2x-1)2 (5)(a-2b+1)(a+2b-1); (6)(x2y3-x2y3+2x2y2)÷(-xy2). |
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