整式的乘法练习题1(一)填空1a8=(-a5)_2a15=( )533m22m3=_5a3(-a)5(-3a)2(-7ab3)=_6(-a2b)3(-ab2)=_7(2x)2x4=( )2824a2b3=6a2_9(am)np=_10(-mn)2(-m2n)3=_14(3x2)3-7x3x3-x(4x2+1)=_21若a2n-1a2n+1=a12,则n=_ (三)计算1(6108)(7109)(4104) 2(-5xn+1y)(-2x)3(-3ab)(-a2c)6ab2 4(-ab)3(-a2b)(-a2b4c)2 5(-4a)(2a2+3a-1) 6xn+1(xn-xn-1+x)7(3m-n)(m-2n) 8(x+2y)(5a+3b) (四)求值1先化简yn(yn+9y-12)-3(3yn+1-4yn),再求其值,其中y=-3,n=2第1页 共1页