初一数学下册计算题天天练 42.docx

1、初一数学下册计算题天天练 42 (5k2 k)(9k2 k1) (4a25a6b)(6a28a7b) 6x2(5x26x1)(3x4) 2y2(7x2y)(4x24y2) 8(6x29xyx)(8x25xy8x) 7 1 6(xy7y23)(x2xy4y23) 6 7 1 9(xyy)(xyx5) 5 8 (9y7x9z2)( y6x z2) (5m29m5)(8m4n3) (3x25x9)9(3x28x) 3(x24)4(x23) (x2y6xy5)9(x2y7xy3) 8 6(x213x13y)(x220x26y) 7 7 1 1(4k36k22)( k34k27k) 6 4 (8k24k

2、)(6k28k6) (8a25a6b)(9a2 a b) 2x2(8x23x3)(7x4) 6y2(9x2y)(8x24y2) 7(5x25xyx)(4x24xy9x) 8 2 9(xy5y23)(x2xy8y22) 3 8 1 8(xyy)(xyx6) 3 7 (3y8x2z2)(6y3x5z2) ( m2 m2)(3m5n1) (2x2 x9)3(9x24x) 9(x28)8(x29) (x2y5xy2)4(x2y7xy8) 1 7(x221x19y)(x218x27y) 6 6 1 1(8k39k29)( k3 k25k) 6 6 (9k23k)(2k23k1) (6a29a b)(5a

3、27a4b) 5x2(3x29x1)(6x4) 7y2( x2y)(9x23y2) 9(8x28xyx)(7x2 xy8x) 8 1 2(xy y27)(x2xy8y25) 4 3 5 8(xyy)(xyx2) 6 7 (8y6x4z2)(8y6x9z2) (7m28m2)(9m6n2) (6x23x3)5(5x24x) 4(x24)7(x26) (x2y7xy9)2(x2y2xy6) 7 7(x221x19y)(x210x11y) 6 6 1 1(7k3 k23)( k37k28k) 4 6 (7k23k)(4k23k9) (5a22a b)(5a26a b) 3x2(8x28x9)(2x8

4、) y2(9x2y)(2x24y2) 7(7x26xyx)(3x23xy9x) 6 7 5(xy2y22)(x2xy5y27) 6 6 1 5(xyy)(xyx3) 4 4 (6y x7z2)(7y7x7z2) ( m28m5)( m3n9) (8x27x2)6(8x23x) 9(x25)4(x25) (x2y2xy8)4(x2y9xy9) 1 7(x213x12y)(x216x12y) 8 8 1 1(7k3 k29)( k32k22k) 6 6 (4k2 k)(9k25k7) (7a25a3b)(4a23a b) 7x2(3x22x5)(6x7) y2(8x2y)(2x25y2) 5(6x

5、27xyx)(5x24xy3x) 4 1 6(xy8y21)(x2xy3y27) 7 5 8 1(xyy)(xyx6) 7 3 (5y x8z2)(4y6x4z2) (8m2 m3)(9m5n1) (8x22x9)7(7x27x) 4(x24)4(x29) (x2y5xy5)5(x2y2xy5) 1 7(x225x11y)(x211x19y) 6 6 1 1(3k37k29)(8k38k29k) 6 6 (7k24k)(9k23k2) (9a26a9b)(7a2 a4b) 5x2(8x28x6)(8x6) 6y2(2x2y)( x24y2) 3(4x26xyx)(6x23xy2x) 4 9 1

6、(xy5y21)(x2xy7y29) 8 6 1 1(xyy)(xyx6) 6 6 (7y8x8z2)(2y4x7z2) (8m22m2)(6m6n3) (3x27x6)2(2x23x) 7(x29)6(x29) (x2y7xy3)5(x2y7xy3) 8 8(x223x17y)(x218x18y) 7 7 1 1(5k39k23)(4k32k23k) 4 5 (9k23k)(7k2 k8) (3a29a8b)(7a25a7b) 5x2( x23x6)(5x6) 9y2(5x2y)(2x2 y2) 1(4x27xyx)(5x29xy4x) 6 3 1(xy2y29)(x2xy8y21) 4 6 1 4(xyy)(xyx3) 7 3 (4y6x z2)(6y4x z2) ( m28m5)(4m8n1) (3x28x9)5(5x2 x) 3(x27)7(x28)