- 计算÷3a•xy等于( ) A. B. C. D.x3y2
- 化简:a2-b2a2+2ab+b2÷2a-2ba+b=______.
- 计算:的结果是( ) A. B. C. D.
- 计算;(1)(-x2y)2•(-y2x)3•(-1x)4;(2)4x2y÷(2x-y)2;(3)(b2ac)3÷(-b6c);(4)-x-yx+2y÷x2-y2x2+4xy+4y2•x-yx+2y;(5...
- 若n为正整数,则化简(-ab3x2)2n+1=______.
- (x2-y)5•(y2-x)2•(1xy)7=______;[(-y2x)3]2=______.
- 若xmyn÷x3y=,则( ) A.m=6,n=1 B.m=4,n=1 C.m=2,n=1 D.m=2,n=0
- 计算:(1)(-b22a)÷(-ba2)3÷(1ab)3;(2)(a2-b2b)2÷(a2+ab)2•(abb-a)2;(3)a+2a2-2a+1•a2-4a+4a+1÷a2-4a2-1;(4)x2-1x2...
- 已知a米布料能做b件上衣,2a米布料能做3b条裤子,则一件上衣的用料是一条裤子用料的______倍.
- 化简(ab-b2)÷a-bab的结果是______.
- 计算:(1)3b24a2•(-a6b);(2)-3xy2÷6y25x;(3)x2-xx+1•x2-1x2-2x+1;(4)3ab+a2b2-a2÷a+3ba-b.
- 计算.(1)x+22-x•4-x2x2+2x;(2)1-yy2-4y+4÷y2-1y2-4.
- 计算5a3b22c•10c5a3b4=______.
- 3xx2÷x3x2=______.
- 计算a2÷b×1b÷c×1c÷d×1d=______.