初一数学下册计算题天天练 28.docx

1、初一数学下册计算题天天练 28 ( k28k)(7k24k7) (3a25a3b)(8a22a9b) x2(8x23x7)(2x2) 6y2(2x2y)(4x29y2) 1(6x26xyx)(8x23xy x) 4 7 8(xy4y26)(x2xy6y27) 8 7 1 1(xyy)(xyx5) 6 6 (8y8x z2)(4y x5z2) (7m26m9)(5m7n9) (4x23x6)8(4x26x) 8(x26)3(x22) (x2y5xy3)5(x2y8xy7) 6 4(x220x12y)(x217x12y) 5 5 1 1(6k34k29)(2k37k24k) 2 3 (9k22k)

2、(6k26k4) (2a28a2b)(7a26a9b) 8x2(6x27x4)(9x9) 2y2(9x2y)(6x2 y2) 4(6x26xyx)(6x23xy3x) 5 1 6(xy3y26)(x2xy7y26) 8 7 6 6(xyy)(xyx3) 5 7 (4y7x2z2)(4y9x5z2) (6m29m7)(6m5n5) (8x24x9)8(8x27x) 8(x23)6(x26) (x2y5xy3)6(x2y2xy2) 6 8(x222x17y)(x218x21y) 7 7 1 1(7k36k27)(7k32k21k) 4 6 (4k27k)(9k22k4) (7a28a4b)(6a2

3、 a9b) x2(3x27x4)(8x4) 4y2(4x2y)(5x24y2) 1(8x2 xyx)(2x28xy7x) 6 4 6(xy4y26)(x2xy9y27) 3 7 7 1(xyy)(xyx6) 6 4 (3y9x5z2)(7y x3z2) (8m27m2)(4m8n5) (8x26x9)4(7x29x) 6(x26)5(x24) (x2y8xy4)4(x2y4xy5) 7 5(x221x20y)(x218x26y) 6 6 1 1(8k38k25)(3k38k26k) 6 3 ( k22k)(4k28k2) (4a24a b)(5a2 a b) 7x2(4x27x3)( x6)

4、2y2(4x2y)(4x28y2) 1(3x27xyx)(9x22xy8x) 8 1 1(xy3y21)(x2xy5y28) 6 6 5 2(xyy)(xyx4) 4 3 (5y4x5z2)(9y2x3z2) (9m22m7)(8m8n3) (2x25x1)6(7x24x) 2(x22)2(x26) (x2y8xy7)5(x2y9xy4) 1 6(x214x10y)(x211x24y) 7 7 1 1(4k37k24)(7k36k27k) 6 5 ( k23k)(2k2 k8) (5a26a3b)(3a25a6b) 3x2( x22x8)(2x5) 3y2(6x2y)(4x24y2) 1(7x

5、26xyx)(9x29xy6x) 4 4 2(xy9y22)(x2xy8y27) 5 3 7 1(xyy)(xyx1) 6 5 (4y5x3z2)(7y5x9z2) (7m28m8)(2m4n2) (8x27x8)6(5x28x) 6(x25)2(x29) (x2y5xy6)2(x2y8xy7) 1 5(x213x15y)(x212x13y) 6 6 1 1(4k39k25)(9k35k25k) 6 3 (4k26k)(9k2 k9) (5a27a3b)(5a25a8b) 8x2(7x29x7)(8x9) 9y2(4x2y)( x26y2) 1(7x2 xyx)(5x28xy x) 5 6 8

6、(xy3y23)(x2xy7y26) 5 7 6 1(xyy)(xyx2) 7 5 (4y5x6z2)(5y5x8z2) (6m25m7)(2m5n7) (8x27x5)5(7x23x) 5(x25)7(x29) (x2y4xy6)9(x2y7xy6) 5 1(x226x11y)(x210x27y) 4 4 1 1(9k36k29)(8k38k24k) 6 3 (7k25k)(3k27k5) (4a28a9b)(7a2 a3b) 5x2(4x2 x1)(4x5) y2(5x2y)( x29y2) 1(3x23xyx)(9x28xy5x) 4 1 9(xy4y24)(x2xy y29) 5 8 2 5(xyy)(xyx4) 3 6 ( y2x2z2)(5y x9z2) (4m25m5)(3m7n5) (6x28x8)7(8x29x) 3(x21)7(x22)