1、七年级数学下册整式的加减法练习题精选强烈推荐 68 (8m26m6)(7m n9) (5x29x8)4(7x26x) 9(x29)2(x26) (x2y2xy7)8(x2y9xy8) 6 1(x218x20y)(x220x16y) 7 7 1 1(4k36k26)(5k39k29k) 6 2 (7k25k)(2k28k2) (2a25a8b)(2a29a2b) 5x2(5x2 x8)( x7) y2( x2y)(8x26y2) 1(9x26xyx)(5x28xy7x) 4 7 6(xy7y22)(x2xy8y23) 6 7 4 1(xyy)(xyx7) 3 3 (7y3x3z2)(2y7x6z
2、2) (2m28m6)(7m4n1) (7x27x5)4(6x23x) 2(x28)4(x24) (x2y6xy8)8(x2y7xy6) 6 1(x219x12y)(x214x26y) 7 7 1 1( k35k21)(6k37k28k) 2 6 (4k27k)(2k22k9) (6a25a6b)(2a24a4b) 8x2(6x24x8)( x7) 3y2(8x2y)(5x26y2) 1(3x28xyx)(9x28xy x) 4 1 6(xy8y27)(x2xy9y22) 6 5 7 1(xyy)(xyx9) 8 5 (8y8x5z2)(8y2x4z2) (8m26m6)(7m3n3) ( x
3、24x7)8(5x2 x) 9(x24)2(x26) (x2y3xy4)4(x2y5xy9) 1 1(x223x18y)(x210x28y) 5 5 1 1(3k39k22)(4k34k26k) 6 3 (6k22k)(9k28k8) (2a22a6b)(8a27a8b) 2x2(8x28x5)( x7) 9y2(2x2y)(4x23y2) 1(6x26xyx)(7x23xy9x) 5 9 1(xy5y29)(x2xy2y28) 8 3 7 7(xyy)(xyx2) 6 8 (3y x7z2)(8y4x3z2) (9m24m7)(7m4n4) (4x2 x2)4( x23x) 3(x21)7(x24)