14.1整式的乘法一、选择题1.计算:(-2a)2•(-3a)3的结果是()A.-108a5B.-108a6C.108a5D.108a62.3a2b•5a3b2等于()A.8a5b3B.8a6b2C.15a6b2D.15a5b33.已知am+2n•bn+2•(bm)2=a5b6,则m+n的值为()A.1B.2C.3D.44.计算(2a3)2•a3的结果是()A.2a8B.2a9C.4a8D.4a95.计算x3y2•(-xy3)2的结果是()A.x5y10B.x5y7C.-x5y10D.x5y86.计算4x3yz÷2xy正确的结果是()7.-(-2x3y2)2·(-1)2013·(-32x2y3)2的结果等于()A.3x10y10B.-3x10y10C.9x10y10D.-9x10y108.计算(-3x)•(2x2-5x-1)的结果是()A.-6x2-15x2-3xB.-6x3+15x2+3xC.-6x3+15x2D.-6x3+15x2-19.使(x2+px+8)(x2-3x+q)中不含x2与x3项的p、q的值是()A.p=0,q=0B.p=3,q=1C.p=-3,q=-9D.p=-3,q=110.计算(-4x3+12x2y-7x3y2)÷(-4x2)等于()二、填空题11.若-5am+1•b2n-1•2ab2=-10a4b4,则m-n的值为.12.(-2)0=.13.计算(-2a)3•3a2的结果为.14.计算:2x(x2-23x+5)=.15.-21a2b3c÷3ab=.16.计算:(5x5-3x2)÷(-x)2=.三、解答题17.计算:5m3n•(-3n)2+(6mn)2•(-mn)-mn3•(-4m)2.18.计算:(1)(-2xy2)2•3x2y;(2)(-2a2)(3ab2-5ab3).19.计算:(3m2n)2•(-2m2)3÷(-m2n)2.20.计算:(1)(-51)-1-4×(3-Π)0+(-1)2017.(2)(4ab3-8a2b2)÷4ab-b2.参考答案1.A2.D3.C4.D5.D6.C7.C8.B9.B10.B11.1212.113.-24a514.2x3-3x2+10x15.-7ab2c16.5x3-317.解:5m3n•(-3n)2+(6mn)2•(-mn)-mn3•(-4m)2=5m3n•9n2+36m2n2•(-mn)-mn3•16m2=45m3n3-36m3n3-16m3n3=-7m3n3.18.解:(1)(-2xy2)2•3x2y=4x2y4•3x2y=12x4y5.(2)(-2a2)(3ab2-5ab3)=-2a2×3ab2-2a2×(-5ab3)=-6a3b2+10a3b3.19.解:原式=(9m4n2)•(-8m6)÷(m4n2)=(-72m10n2)÷(m4n2)=-72m6。20.解:(1)原式=(-5)-4×1+(-1)=-5-4-1=-10.(2)原式=b2-2ab-b2=-2ab.