计算:(1)m5÷m2×m;(2)(13a2b3)-(-15a2b2);(3)(a2bc)2÷(ab2c);(4)(2x2y+3xy2)-(6x2y-3xy2)
题型:解答题难度:一般来源:不详
计算: (1)m5÷m2×m; (2)(a2b3)-(-15a2b2); (3)(a2bc)2÷(ab2c); (4)(2x2y+3xy2)-(6x2y-3xy2); (5)(4x+3)(2x-4); (6)(3a2b-2ab+2ab2)÷(ab); (7)(a+2b)2-4ab-2(a2-2b2); (8)(x+2)2-(x+1)(x-1). |
答案
(1)原式=m3•m=m4; (2)原式=-5a4b5; (3)原式=a4b2c2÷(ab2c)=a3c; (4)原式=2x2y+3xy2-6x2y+3xy2=-4x2y+6xy2; (5)原式=8x2-16x+6x-12=8x2-10x-12; (6)原式=3a-2+2b; (7)原式=a2+4ab+4b2-4ab-2a2+4b2=-a2+8b2; (8)原式=x2+4x+4-x2+1=4x+5. |
举一反三
计算. (1)(a-2b+3c)2-(a+2b-3c)2; (2)[ab(3-b)-2a(b-b2)](-3a2b3); (3)-2100×0.5100×(-1)2013÷(-1)-5; (4)[(x+2y)(x-2y)+4(x-y)2-6x]÷6x; (5)5a2-[a2+(5a2-2a)-2(a2-3a)]. |
算一算: (1)3m2•m8-(m2)2•(m3)2; (2)(-2a2b3)4+a8•(-2b4)3 (3)计算:-2100×0.05100×(-1)999. |
已知+(b+)2=0,求(a+b)2-(2a-b)(2a+b)+(a+b)(3a-2b)的值. |
如图所示,计算这个图形的体积.
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请阅读下列材料: 让我们来规定一种运算:=ad-bc,例如:=2×5-3×4=10-12=-2 再如,=4x-2,按照这种运算的规定:请解答下列各个问题: (1)=______(只填最后结果);(2)化简. |
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