人教版初中八年级数学上册分式的化简练习题精选6.docx

1、人教版初中八年级数学上册分式的化简练习题精选6 30abc2 10a3b3c2 x281x215x544m28mb4b2 6m6b 5a3b345abc(x5)y3 xy32x22xy10(xy)22z22zc2z22c23x23y22(xy)2 45a2bc210abc3 x2100x215x507m214mn7n2 6m6n 15ab40ab2c(2x5)y3 xy310x210xy2(xy)22y22yb2y22b27x27y23(xy)230abc2 35a3b3c2 x24x28x125x210xb5b2 7x7b10ab350ab2c(3x4)y x3y22x22xy5(xy)24

2、x24xa4x24a25x25y22(xy)215abc50ab3c3 x225x28x156x212xb6b2 2x2b 25abc 40ab3c2(x4y)y3 xy10x210xy4(xy)210x210xb5x25b28x28y23(xy)2 30a3bc340ab2c2 x2100x216x606a212ab6b2 2a2b 10a2bc40a2b2c2(3x4)y xy6x26xy4(xy)26x26xa5x25a27x27y25(xy)250abc210abc3 x21x23x27a214ab7b2 10a10b10a3b3c 40a3b3c(3x6y)y xy8x28xy8(x

3、y)28y28yb2y22b26x26y23(xy)240abc 10abc x21x25x45a210an5n2 7a7n 15a3b3c 30a3bc2(2x5)y x2y10x210xy6(xy)22x22xc2x22c24x24y24(xy)25abc50a2bc x29x29x184a28ay4y2 8a8y 10a3b235abc(3x5y)y xy28x28xy9(xy)24x24xb5x25b28x28y23(xy)250ab3c5a3bc x216x27x128a216ay8y2 2a2y 10a2b335a2bc3(2x5y)y x2y8x28xy5(xy)26y26yc2

4、y22c24x24y22(xy)2 5abc5a2bc x21x25x46m212my6y2 8m8y20abc45a2bc(x6)y x3y28x28xy8(xy)24z24zb5z25b25x25y22(xy)210a2b2c340ab3c x225x27x102x24xy2y2 9x9y 25a3bc 45a3b3c3(x4)y x2y22x22xy10(xy)28x28xc3x23c26x26y25(xy)2 10abc315abc3 x24x27x104a28ab4b2 5a5b 5ab2 30ab2c3(x5y)y x2y2x22xy3(xy)210z210za4z24a29x29

5、y22(xy)25a3b3c2 20a3b3c x21x23x27a214ay7y2 4a4y15a3b2 35ab3c3(3x5)y3 x2y24x24xy6(xy)24y24ya2y22a29x29y25(xy)230a2bc 25abc3 x225x211x308a216an8n2 3a3n 20a2b250abc(3x6y)y3 xy10x210xy2(xy)210x210xb3x23b28x28y25(xy)2 5a3b3c35ab3c3 x21x24x35m210my5y2 9m9y 20ab 50a2b3c(2x5y)y3 x3y34x24xy3(xy)24z24zb3z23b2

6、4x24y25(xy)2 35a2bc220a3bc2 x264x212x322m24my2y2 2m2y 25ab35a2bc(x6)y2 x3y210x210xy8(xy)26z26zb5z25b28x28y23(xy)2 10abc 50a2b2c2 x249x211x282x24xy2y2 2x2y 25abc 50ab3c(x4y)y2 xy38x28xy10(xy)210y210yb2y22b26x26y24(xy)220a2b2c 50a2b2c3 x24x28x128m216mn8n2 6m6n15abc50abc3(2x6)y x3y8x28xy4(xy)24z24zb2z2

7、2b23x23y22(xy)2 15abc335a3bc x236x28x125x210xn5n2 7x7n20ab50ab2c(2x6)y xy32x22xy9(xy)24x24xb4x24b22x22y22(xy)2 40abc 35a2b2c3 x264x211x245x210xn5n2 5x5n20a3bc 40a2b2c2(2x4)y x2y6x26xy2(xy)22x22xc2x22c26x26y22(xy)2 45a2bc30abc2 x249x211x282m24mn2n2 9m9n5a3b3 30a2bc3(3x5)y2 xy32x22xy10(xy)28x28xa4x24a

8、29x29y25(xy)2 45a2bc3 50a3bc x2100x214x404m28mn4n2 3m3n 25abc40a2bc(3x6)y x3y6x26xy10(xy)210z210zb4z24b28x28y23(xy)210ab2c50abc x249x211x284a28an4n2 8a8n 15abc 45abc(x5y)y xy2x22xy5(xy)28x28xc5x25c28x28y25(xy)2 40abc3 40a3bc x225x28x155m210mb5b2 5m5b15a3b230a3bc(3x6)y3 x3y8x28xy5(xy)28y28yb2y22b27x2

9、7y23(xy)2 10ab3c25ab2c x29x27x122a24an2n2 8a8n25ab240a2bc(3x5y)y2 xy28x28xy4(xy)28z28za4z24a25x25y22(xy)2 35a2bc330a3b2c2 x281x213x368x216xn8n2 6x6n15a2b3 35abc(2x5y)y3 xy10x210xy5(xy)26y26ya4y24a25x25y23(xy)2 50ab2c35ab3c x236x212x363x26xb3b2 8x8b15ab 40abc3(x5)y3 xy4x24xy8(xy)28y28ya3y23a24x24y22(

10、xy)235a3b2c3 50abc x29x26x92a24ay2y2 10a10y20abc35a3b3c3(x5)y2 xy24x24xy4(xy)24y24ya3y23a22x22y22(xy)245abc 45a2b2c x21x25x44x28xy4y2 7x7y5abc35a2bc3(2x4y)y xy38x28xy10(xy)28x28xc2x22c27x27y22(xy)2 15ab3c325ab3c x29x26x97x214xn7n2 4x4n10a3b3c50abc(3x6)y2 x3y26x26xy4(xy)26y26ya5y25a22x22y22(xy)2 40a3

11、b2c235ab3c2 x29x29x185a210ay5y2 9a9y5ab345a2b3c2(x4y)y xy8x28xy6(xy)26z26zb2z22b28x28y22(xy)245a3bc2 5ab2c3 x281x212x275a210an5n2 2a2n25a3b2 45abc(3x4y)y xy32x22xy3(xy)210z210zb5z25b25x25y25(xy)235a2b3c35ab3c x249x210x217a214ay7y2 5a5y 15a3b 30a2b3c3(x6)y2 xy22x22xy8(xy)28x28xc5x25c25x25y24(xy)2 10a

12、bc3 10abc x236x212x362a24ay2y2 8a8y 20ab 45a3bc3(x6)y3 x2y2x22xy10(xy)210y210yc2y22c26x26y25(xy)2 30a3bc25abc x2100x212x204a28an4n2 2a2n5a3b2 30a3b2c(x5)y xy4x24xy5(xy)24y24yc4y24c25x25y25(xy)225ab2c20a2bc2 x216x26x86a212ay6y2 10a10y 5ab2c40ab3c3(2x5)y2 xy8x28xy6(xy)26y26yc4y24c28x28y22(xy)215ab2c35

13、ab2c x21x25x43a26ab3b2 8a8b 5abc40abc2(x5)y xy28x28xy10(xy)28x28xa2x22a28x28y25(xy)220ab3c30a3bc2 x236x29x188a216an8n2 3a3n 25a2bc 45a2b3c2(x5)y xy2x22xy4(xy)22x22xc4x24c24x24y22(xy)2 25a3b2c2 5ab3c2 x264x212x326x212xb6b2 5x5b 15ab240a3bc2(2x4y)y x3y210x210xy8(xy)22z22za5z25a27x27y25(xy)2 5a3b3c2 25

14、abc x24x28x127a214an7n2 4a4n15ab3c30a2b3c(3x5y)y xy24x24xy7(xy)24x24xb3x23b28x28y23(xy)2 40abc2 30abc2 x225x27x103a26ay3y2 3a3y25abc35a3bc(2x5y)y xy38x28xy3(xy)22z22za5z25a22x22y25(xy)2 25a2b3c245abc3 x249x210x216x212xb6b2 4x4b 20abc50ab3c(3x4)y x3y8x28xy9(xy)26y26yc4y24c22x22y24(xy)2 10a3b3c25a2bc

15、x281x215x547m214my7y2 4m4y 25a2b240ab3c3(x5)y x3y8x28xy10(xy)22z22zb3z23b28x28y22(xy)25a3b2c45ab3c x264x212x328x216xy8y2 8x8y 20abc 50a2bc3(x5)y x2y4x24xy10(xy)26z26za4z24a23x23y23(xy)2 35ab2c 20a3b2c2 x225x28x157x214xb7b2 4x4b 20ab345a2bc3(3x5)y3 x3y6x26xy10(xy)210x210xc2x22c28x28y23(xy)215abc2 10a

16、3bc x29x29x182m24mn2n2 9m9n 10ab2c30a2bc(2x6y)y x3y10x210xy10(xy)210x210xc4x24c29x29y24(xy)2 10a2b3c45a3bc x281x215x548x216xy8y2 4x4y 5abc50abc2(x5y)y3 x3y36x26xy8(xy)26z26zb5z25b22x22y23(xy)2 40a3b2c3 25a3bc2 x264x210x165a210ab5b2 4a4b25ab250a2b3c(3x5y)y2 xy32x22xy6(xy)26z26zb4z24b25x25y24(xy)2 20abc350a3bc x24x28x123a26ab3b2 6a6b 10abc 40ab2c2(3x4)y xy210x210xy4(xy)26y26yb