七年级数学下册整式的加减法练习题精选强烈推荐 71.docx

1、七年级数学下册整式的加减法练习题精选强烈推荐 71 7y2( x2y)(4x2 y2) 1(2x2 xyx)(8x25xy2x) 3 1 9(xy7y21)(x2xy4y23) 5 8 6 5(xyy)(xyx3) 5 4 (3y x8z2)(9y7x2z2) (5m26m4)(4m2n3) (9x2 x9)8(4x25x) 3(x23)4(x22) (x2y5xy8)3(x2y7xy9) 3 1(x230x12y)(x214x27y) 4 4 1 1(4k39k21)(7k35k29k) 4 3 (8k26k)(8k26k9) ( a29a7b)(6a28a4b) x2(9x26x8)(2x

2、3) y2(2x2y)(3x22y2) 1(8x25xyx)(8x26xy2x) 4 1 1(xy5y28)(x2xy y29) 7 4 1 1(xyy)(xyx2) 3 5 (3y9x z2)(5y3x3z2) (9m28m1)(8m n6) ( x29x2)4(4x23x) 2(x21)7(x27) (x2y4xy6)8(x2y9xy7) 2 1(x211x14y)(x214x23y) 3 3 1 1(3k36k27)(7k39k23k) 2 5 (5k24k)(4k28k1) (3a28a7b)(9a2 a b) 3x2(9x25x4)(3x3) 8y2(2x2y)(3x23y2) 1(

3、6x29xyx)( x2 xy3x) 4 1 3(xy5y28)(x2xy8y27) 6 4 7 1(xyy)(xyx4) 6 8 (8y x4z2)( y6x2z2) (8m29m3)(7m2n6) (4x28x1)6(2x24x) 9(x26)9(x25) (x2y8xy7)5(x2y5xy8) 6 1(x230x11y)(x216x16y) 7 7 1 1(7k33k27)(9k39k22k) 2 6 ( k25k)(8k24k8) ( a29a9b)(9a25a4b) 5x2(4x29x8)(2x7) 9y2(7x2y)( x26y2) 7(6x26xyx)(8x25xy6x) 8 7 5(xy7y29)(x2xy8y27) 6 6