1、七年级数学下册整式的加减法计算题 4978 2 (xy y26)(x2xy2y21) 7 3 3 3 (xyy)(xyx1) 4 4 (4y x7z2)(8y2x2z2) (2k24k)(6k26k3) ( a22a7b)(3a24a4b) 4x2(8x27x5)(2x3) 7y2(4x2y)(4x25y2) 2 (9x25xyx)(6x27xy2x) 3 5 6 (xy6y26)(x2xy3y22) 4 7 2 9 (xyy)(xyx4) 3 8 (9y8x9z2)(4y7x9z2) (2k28k)(9k29k3) (2a2 a8b)(8a24a8b) 6x2(5x25x9)(6x2) 8y
2、2(6x2y)(9x24y2) 1 (7x2 xyx)( x28xy8x) 7 5 6 (xy2y21)(x2xy9y28) 4 5 4 3 (xyy)(xyx3) 3 4 (4y x8z2)(5y5x4z2) (8k23k)(8k29k1) (8a29a8b)(9a25a5b) 3x2(9x26x5)(5x8) 4y2(5x2y)(6x2 y2) 2 (5x24xyx)(6x28xy9x) 3 1 1 (xy2y24)(x2xy3y26) 4 3 1 1 (xyy)(xyx8) 8 4 (5y3x9z2)( y9x3z2) (5k28k)(9k27k4) (6a2 a6b)(4a22a4b)
3、 8x2(9x28x1)(9x3) y2( x2y)( x27y2) 5 ( x23xyx)(4x29xy2x) 4 4 1 (xy6y23)(x2xy3y29) 5 8 1 1 (xyy)(xyx8) 5 3 (3y9x6z2)(3y4x z2) (3k29k)(4k23k6) (2a28a9b)(2a24a b) 8x2(3x28x7)(7x7) 2y2(5x2y)(8x28y2) 2 (3x2 xyx)(9x25xy6x) 3 2 8 (xy9y21)(x2xy9y25) 3 7 6 1 (xyy)(xyx3) 5 4 (7y6x3z2)(8y x7z2) (9k27k)( k26k4) (9a27a5b)(7a29a7b)