- 计算: (1)ymym+1(2)(﹣2xy3z2)4(3)(﹣3×103)2(4)5x(2x2﹣3x+4)(5)(2a﹣b)2(4a2+b2)2(2a+b)2(6)[(x...
- 计算:(1)(﹣0.25)2009×42008+(2)﹣2(﹣2a﹣)(4a﹣)(3)x18÷[(﹣x3)2]2+(﹣x3)÷x2x5(4)化简求值:(x﹣y)...
- 计算:(1)(x3x5)×x2(2)(﹣2x4)3+3x4(﹣x)8(3)6x(x﹣3y2)(4)(2x﹣3)(4﹣x)(5)
- 化简与计算(1)计算(2)化简(3).
- 计算下列各题.(1)﹣32+|﹣8|﹣(π﹣2009)0﹣1÷(﹣2)﹣1(2)20082﹣2007×2009(3)﹣3(4)(﹣ab2)3(﹣9a3b)÷(﹣3...
- 计算:(1).(2).(3).(4)[(x+2y)2﹣(x+y)(3x﹣y)﹣5y2]÷2x.(5)(2x﹣y+1)(2x+y﹣1).(6)(x﹣y)2(x...
- 计算(1)(2)a﹣b=3,ab=10,求a2+b2的值(3)[(x+2y)2﹣(x﹣y)(x+2y)﹣5y2]÷(2y)
- 计算:(1)[(x+2y)2﹣(x+y)(3x﹣y)﹣5y2]÷2x;(2);(3).
- (1)(﹣x﹣y)(x﹣y)+(x+y)2;(2)(2a6x3﹣9ax6)÷(3ax3);(3)(2x﹣5)(2x+5)﹣(2x+1)(2x﹣3);(4);(...
- 计算下列各题:(1)16+(﹣29)﹣(﹣7)﹣(+11);(2)(﹣1)2003+(﹣)×12+(﹣)×21;(3)﹣52﹣[1﹣(+)+(﹣)]×...
- 对于有理数a、b,定义运算:ab=a×b﹣a﹣b+1.(1)计算(﹣3)4的值;(2)填空:5(﹣2)_____(﹣2)5.(填“>”或“=”或“
- 对于有理数a、b,定义运算:ab=a×b﹣a﹣b+1.(1)计算(﹣3)4的值;(2)填空:5(﹣2)_____(﹣2)5.(填“>”或“=”或“
- 计算:(1);(2)(2a+b)2﹣(2a+b)(2a﹣b);(3)(﹣2x2y)3+(x2)2·[(﹣3x)2·y3﹣x3],其中x=2,.
- 计算:(1);(2) (2x﹣3y)2﹣(y+3x)(3x﹣y).
- 计算:(1)2(a4)3+(﹣2a3)2(﹣a2)3+a2a10;(2)+(﹣3)0+(﹣0.2)2005×(﹣5)2004.