北师大版七年级数学下册整式的加减法计算题精选 80.docx

1、北师大版七年级数学下册整式的加减法计算题精选 80 (8k28k)(5k23k4) (9a28a4b)(9a23a3b) 4x2(4x24x6)(9x7) 7y2(5x2y)(9x29y2) 1(3x2 xyx)(5x23xy3x) 6 1 1(xy y27)(x2xy7y28) 8 8 5 1(xyy)(xyx3) 4 3 (3y x8z2)(8y8x3z2) (9k2 k)(3k23k8) (3a25a8b)(8a27a4b) 6x2(9x23x4)(5x3) 5y2( x2y)(6x2 y2) 1(5x29xyx)(3x28xy9x) 7 1 9(xy2y28)(x2xy4y21) 6

2、8 1 1(xyy)(xyx4) 6 8 (4y5x3z2)(9y8x2z2) (4k25k)(2k26k5) (3a24a2b)(2a2 a5b) 2x2(3x26x9)(7x5) 6y2(6x2y)(3x24y2) 1(2x25xyx)(6x2 xy8x) 7 1 4(xy6y21)(x2xy y22) 7 3 4 1(xyy)(xyx1) 3 3 (9y6x6z2)(9y7x2z2) (7k27k)( k25k1) (7a26a3b)(9a29a2b) 8x2(3x24x8)(3x5) 5y2(5x2y)(6x2 y2) 1(6x2 xyx)(8x24xy6x) 6 2 8(xy7y27

3、)(x2xy3y24) 3 7 6 8(xyy)(xyx1) 7 7 (4y7x6z2)(2y6x8z2) (3k29k)(5k23k3) (9a2 a7b)(8a2 a2b) 4x2(9x24x2)(2x4) 7y2(5x2y)(9x22y2) 9(2x2 xyx)(2x28xy4x) 8 1 7(xy8y21)(x2xy2y25) 7 6 5 1(xyy)(xyx4) 4 6 (3y x z2)(9y x3z2) ( k25k)(8k23k9) (5a26a7b)( a28a b) 2x2(5x27x8)(3x6) 4y2(2x2y)(8x25y2) 1(5x29xyx)(7x27xy x) 7