人教版八年级数学上册分式的加减法练习题7

x+y7x43

1

x2—y3x2—y36cd22cd2

22a8a

1

2p+b2p—b3a+8(3a+8):

b—72n3

1

bbx2—n2x-n

7x7xxx2

11x+9

x+3x+3x+3x—9

8x—y2x33

x2—yx2—y8c2d29cd2

13a7a

11

y+2ny—2n6a+8(6a+8)2

x—56a5

11

1971

XXaz-nza-n

9xXXa

a—4

x+3x+3x+3a—5

x-y6x43

T

x3+y2x3+y29cd9c2d2

25n3n

p+bp-b5n+5(5n+5)：

y—69a2

_i1_

yya2—n2a-n

a9a7aa2

a+7

a—4a—4a—4a—7

4x+y42

1

x+yx+y7cd7c2d

45

9y।y

2

y+3by—3b3y+3,(3y+3)

b+73y6

bbx2—y2x-y

8mm6mm2

-------------------1--------------------Pm—3

m+2m+2m+2m—9

x-y4x43

x3+y3x3+y34cd23cd2

55mm

I1

11

3x+3a3x—3a2m—4(2m-4)2

m—96b3

1

I

mmx2—b2x+b

yy8yx2

卜--------k------------—Fx7

y+4y+4y+4X—1

8x+y6x14

x2—y3x2—y35c2d4cd

232nn

1।

x+bx-b3n-3(3n-3)2

x+97n2

1_i1_

XXaz-nza-n

n5nnm2

-------+---------+-----------------+m+2

n+1n+1n+1m—1

5x+5y2x44

x2+yx2+y3cd8cd2

55yy

1

x+3nx—3n4y+5(4y+5)2

b+95y6

11

bba2—y2a-y

X5x2xX

x—2

x—5x—5x—5x—1

7x+y3x42

1

x3+y3x3+y36c2d28c2d2

546x8x

11

p+qp-q3x—7(3x—7)2

x—38X2

11

XXx2—y2x+y

4a5aaa2

卜a—5

a+4a+4a+4a—8

x-y6x31

1

x2—y2x2—y24cd28c2d2

35bb

1

2p+q2p—q4b-2(4b-2)2

a+44m3

1

aamz-yzm-y

x3xxx

-j-x—1

x+6x+6x+6x—4

6x+5y9x12

x2+yx2+y4c2d8cd2

414x3x

1

3p+b3p-b6x+9(6x+9)2

a-83y1

1

aaa2—y2a-y

b5bbX

x—3

b—3b—3b—3x—1

7x+4y9x33

1

xJ3-yx。3一y2c2d6cd

31m5m

j1_।

3p+2n3p—2n5m+2(5m+2)2

n—48m6

1

1

nnm2—b2m+b

a7aam2

m+8

a+9a+9a+9m—4

9x-y4x21

卜一

x3+y3x3+y37cd24cd2

24b7b

m+2bm—2b6b+7(6b+7)

n+78n3

nnx2—n2x-n

5aaaa2

a—3

a—7a—7a—7a—1

x+y4x43

x2y2x2y26cd6c2d2

---4-+----5-5mm

p+np-n6m—4(6m—4)2

b+63a3

bba2—y2a+y

6mmma

卜a—9

m—9m—9m—9a—4

4x+y3x31

x3+y3x3+y39c2d29cd

53a7a

1

p+np-n2a+4(2a+4):

b—25a5

11

bba'—y，a+y

x+2

y+3y+3y+3x—6

x+3y13

x2+y2x2+y26c2d26c2d2

542aa

l

2y+2q2y-2q5a-8(5a—8)：

y—43X5

1

1

yyx2—y2x-y

4a6aax2

卜x—8

a—8a—8a—8x—2

x+3y11

1

x2+y2x2+y23c2d7cd

345y6y

p+3ap—3a2y—1(2y-l)2

a+99m4

1

aamz-nzm+n

aa2amz

m+4

a—2a—2a—2m—6

x+7y9x24

1

x3—y2x3—y27c2d3cd

229nn

1

3p+2b3p-2b2n—1(2n-l)2

x+12a4

1_iI_

XXa2—y2a-y

n6n3nx2

卜x+5

n—6n—6n—6x—5

2x+y33

x2+y3x2+y37c2d9c2d2

428aa

।

2y+3b2y—3b2a—1(2a—l)2

x+27X1

11

11

22

XXxyx-y

mm6ma

a—1

m+5m+5m+5a—8

x+y8x11

---------+--------------------

x3—y3x3—y35cd7cd2

213a7a

---------+---------

2m+b2m—b4a+1(4a+l)2

x+12x1

xxx2y2x+y

mm4mm2

m+6

m+2m+2m+2m—7

x—3y9x44

卜

x3+y2x3+y22c2d25c2d

14n3n

1

3y+3b3y—3b2n-3(2n-3)2

m—73X3

1

97

mmx'in，x+n

7m8m4mm

----1-------1------------km—2

m—3m—3m—3m—8

4x+y32

i

x—3x—y°7c2d6cd2

14yy

1

2m+3b2m—3b5y+7(5y+7)2

a+33X3

aax2—b2x+b

nnnm2

------------+----------Fm+l

n-8n-8n-8m—8

4x-y7x41

1

x+yx+y2c2d25c2d

339yy

।

p+2bp—2b6y—6(6y—6)

x+12b3

1

XXx2—b2x-b

8a2aam

Fm+4

a+4a+4a+4m—2

X—8y8x41

1I

x2—y2x2—y23c2d25c2d2

143y6y

_i_

I1

2p+n2p—n5y—2'(5y-2)2

n+78X6

11

11

nnx2y2x-y

nnna

a—4

n+9n+9n+9a—5

x-y2x21

xJ3-yx。3一y9c2d23cd2

43bb

3p+3b3p-3b4b+2(4b+2)2

b+33n6

11

bbm2—n2m-n

X6xxa2

a+2

x—2x—2x—2a—6

X—y8x34

x+yx+y7cd6cd2

54

y1y

2x+b2x-b5y+l(5y+l)2

b+33a2

_i1_

bbaz-nza+n

8yyym

——十-----+—-------km+7

y+7y+7y+7m—5

7x—7y2y23

x-yx-y6c2d28cd2

143n5n

m+3am—3a4n+7(4n+7)2

b+71X1

1

bbx2—y2x-y

m8mmx2

x—9

m—1m—1m—1x—4

x+y7y33

1

x3—y2x3—y28c2d5cd

24XX

3y+q3y—q4x—1(4x—I)2

a+94a2

1_i_

11

aaa2—b2a-b

8nnnm2

-----------+---------—m+6

n-8n-8n-8m—5

x+5y4x14

x+yx+y4cd28cd2

443a7a

1

3y+b3y-b6a—3(6a-3)2

m+35X5

11

mmx2—n2x-n

nnna2

卜a+5

n+2n+2n+2a—3

x—4y2x11

x3+yx3+y2c2d29cd

53X8x

1

p+2qP—2q5x+3(5x+3)'

m—43n3

mmaz-nza-n

3bb8bm

m+8

b+9b+9b+9m—7

x—9y4x34

x2+yx2+y2c2d23cd2

247n4n

_i_

I

x+2bx—2b2n-9(2n-9)2

a+16X1

aax2y2x+y

2

yyyaz

1

।11a—9

y—4y—4y—4a—8

x—5y6y14

x+y2x+y27c2d22c2d2

11XX

1

2m+n2m—n2x+3(2X+3)2

y-85a5

1

yya2—b2a+b

2xxxm

m—6

x+6x+6x+6m—1

x+8y8x34

x2+yx2+y5cd25cd

14bb

3y+2a3y—2a2b-5(2b-5)2

n+31a1

1

nna2—b2a-b

a—6

n—4n—4n—4a—2

4x+y3y31

1i

x-yx-y8c2d7cd

24n5n

1

3m+a3m—a2n—1(2n-l)2

y+83n3

1

97

yyxz-nzx-n

8n3nnnr2

-Fm7

n+7n+7n+7m—9

x+7y4x12

x—3x—y°4c2d6c2d

558mm

1

3y+2a3y—2a5m+8(5m+8)2

n+36X6

nnx2—b2x+b

a5a4aX

x+7

a+7a+7a+7x—5

x-y7x22

x2—y2x2—y26cd28cd2

154m7m

11

y+ny-n6m+6(6m+6)

n+14a1

1

nna2—b2a-b

2bb5ba

a—6

b+4b+4b+4a—8

x-y2x44

j1_

x2—yx2—y7cd22c2d

249b6b

1

m+3am—3a6b—2(6b-2)2

b+72y6

1

bbm2—y2