七年级数学下册整式的加减法计算题 269.docx

1、七年级数学下册整式的加减法计算题 269 (x2y8xy9)8(x2y6xy5) 9 1(x228x11y)(x210x28y) 8 8 1 1(4k3 k28)(7k36k22k) 2 3 (5m2 m8)(3m4n9) (5x25x7)2(9x26x) 4(x27)6(x23) (x2y3xy2)9(x2y6xy7) 1 1(x226x20y)(x218x28y) 6 6 1 1(3k32k24)(2k36k29k) 6 6 ( m28m9)(2m9n8) (7x25x5)7(7x27x) 6(x23)6(x29) (x2y8xy9)2(x2y2xy6) 1 1(x210x12y)(x21

2、4x12y) 7 7 1 1(7k36k24)(6k32k28k) 6 3 (6m25m3)(5m6n7) (8x22x9)3(7x26x) 5(x26)8(x29) (x2y9xy3)4(x2y3xy9) 1 1(x215x20y)(x220x25y) 4 4 1 1(9k34k22)(4k36k23k) 2 4 (2m23m4)(2m9n5) (8x25x3)2(3x25x) 3(x26)9(x23) (x2y5xy8)5(x2y4xy7) 4 1(x224x13y)(x220x23y) 3 3 1 1(9k33k23)(9k37k21k) 4 5 (9m26m3)(8m2n5) (6x2

3、5x8)9( x2 x) 3(x23)8(x23) (x2y8xy8)3(x2y2xy3) 3 1(x223x11y)(x213x24y) 4 4 1 1(5k37k28)(6k35k23k) 2 2 (9m28m7)(8m8n2) (9x28x4)7(4x28x) 4(x21)6(x27) (x2y7xy2)4(x2y2xy9) 1 4(x218x14y)(x217x10y) 5 5 1 1(5k35k22)(8k37k21k) 4 3 (9m24m4)(6m6n6) (3x26x3)5(5x26x) 5(x25)7(x25) (x2y8xy7)8(x2y6xy3) 4 4(x226x14y)(x219x21y) 5 5 1 1(7k33k29)(6k3 k28k) 6 2