1、北师大版七年级数学下册整式的加减法计算题精选 3371 2(xy8y21)(x2xy3y22) 4 3 2 4(xyy)(xyx4) 3 5 (2y6x8z2)( y x9z2) (7k26k)(6k22k4) (6a29a7b)(9a2 a5b) 8x2( x24x7)(3x6) y2( x2y)(2x27y2) 2(9x23xyx)( x26xy2x) 3 7 1(xy9y26)(x2xy y26) 6 5 5 1(xyy)(xyx9) 4 7 (8y5x2z2)(2y4x7z2) (9k29k)(7k26k4) (8a28a3b)(8a23a6b) 9x2(9x27x7)(7x3) 3y
2、2(2x2y)(6x25y2) 1( x26xyx)(5x22xy4x) 6 1 1(xy y23)(x2xy7y28) 8 3 1 1(xyy)(xyx3) 3 8 (7y4x8z2)(4y9x4z2) (2k29k)(8k23k1) (3a25a b)(8a27a8b) 9x2(7x23x3)(9x4) 5y2(6x2y)(7x28y2) 4(2x2 xyx)(5x25xy9x) 5 1 7(xy8y25)(x2xy y26) 3 6 1 5(xyy)(xyx2) 5 4 (6y x z2)(6y8x9z2) (4k22k)(4k25k1) (9a2 a b)(9a22a6b) 8x2(
3、x29x7)(5x3) y2(8x2y)(8x22y2) 4(6x22xyx)(8x2 xy3x) 5 5 6(xy y22)(x2xy5y24) 4 7 3 7(xyy)(xyx4) 4 8 (5y4x3z2)(7y5x4z2) (9k2 k)(3k25k7) ( a2 a6b)(5a25a4b) 6x2(8x29x8)(3x2) 2y2(6x2y)(7x29y2) 1(2x2 xyx)(7x29xy5x) 6 1 5(xy9y23)(x2xy6y21) 6 4 8 1(xyy)(xyx6) 7 8 (9y7x7z2)(2y2x2z2) (9k27k)(7k28k7) ( a27a b)(4a28a3b)