北师大版七年级数学下册整式的加减法计算题精选 309.docx

1、北师大版七年级数学下册整式的加减法计算题精选 309 (6a24a3b)(2a28a6b) 8x2(2x27x3)(5x1) 9y2(4x2y)(2x2 y2) 1(4x27xyx)(2x22xy7x) 4 8 1(xy7y25)(x2xy9y26) 7 4 1 1(xyy)(xyx9) 6 8 (5y6x4z2)( y6x5z2) (5k28k)(4k27k1) (4a29a2b)(2a2 a b) 3x2(5x28x7)(6x8) 5y2(7x2y)(9x2 y2) 1( x25xyx)(3x22xy2x) 6 7 3(xy4y29)(x2xy y29) 6 4 7 9(xyy)(xyx6

2、) 8 8 (2y6x7z2)(4y4x6z2) (9k29k)(2k23k1) ( a22a9b)(8a23a4b) 6x2(3x23x6)(2x3) 7y2(7x2y)(4x29y2) 7(4x23xyx)( x24xy4x) 6 1 1(xy9y24)(x2xy7y24) 5 3 1 9(xyy)(xyx7) 8 8 (8y7x3z2)(7y6x7z2) (6k26k)(8k25k1) (2a2 a3b)(2a24a6b) 8x2(5x28x2)(7x8) 5y2(5x2y)(6x23y2) 6(8x26xyx)(4x27xy5x) 5 1 1(xy2y23)(x2xy3y24) 4 8

3、 8 9(xyy)(xyx5) 7 8 (2y3x7z2)(6y7x z2) (9k23k)(4k28k7) (7a23a7b)(3a25a5b) 8x2(2x27x1)( x1) 5y2( x2y)(5x2 y2) 8(3x23xyx)(6x28xy9x) 7 7 4(xy y21)(x2xy y26) 6 5 1 7(xyy)(xyx1) 8 8 (7y4x4z2)(3y6x9z2) ( k29k)( k2 k4) ( a26a9b)(4a24a8b) 4x2(4x23x7)(7x3) 9y2( x2y)(5x28y2) 1(7x24xyx)(7x27xy8x) 5 1 1(xy7y29)(x2xy5y28) 6 6