八年级数学上册分式加减运算计算题练习(含答案)(可编辑修改word版)

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八年级数学上册 分式加减运算 计算题练习

1、化简: a 2 - b 2 a - b ÷ (2 + a 2 + b 2

ab ) .

2、化简: 1 - x 2

- 4x + 4 x + x 2 - 4 1

. 2x + 4

3、化简: a + 2

a - 2 ÷ 1 a 2 - 2a

. 4、化简:

1

a -1

-1- a .

5、化简: (m +

2mn + n 2

) ⋅ m

m 2 - mn m 2 - n 2

. 6、化简: 2x - 4 ÷ x 2

- 4 2x

x + 2

-1.

7、化简: (1+ 1 a -1 ) ÷ ( 1

a 2 -1

+1) .

8、化简: (

x +1 + x -1 1 ) ÷ x 2 - 2x +1 x . x -1

9、化简: (1-

1

) ÷ a -1 a 2

- 4a + 4 a 2 - a

. 10、化简: (x -

4 - x ) ÷ x -1 x 2

- 4x + 4

. x -1

11、化简: a + 3 ⋅ a 6 + a 2 + 6a + 9 2a - 6 a 2 - 9

. 12、化简: 2x 2 - 2x - x 2

-1 x

. x +1

13、化简:

2x - x +1 2x + 6 ÷ x 2 -1 x + 3 x 2 - 2x +1

. 14、化简: (1+

2

) ÷ x -1 x 2 + x

.

x 2

- 2x +1

15、化简: x x 2

-1 ÷ (1- 1

x +1

) . 16、化简: (1-

1

) ÷ x + 2 x 2 + x

.

x 2

+ 4x + 4

17、化简: (x - x

) ÷ x -1 x 3 - 2x 2 - x 2

- 2x +1 x x +1

. 18、化简: (x + 2 -

12 ) ÷ x - 2 4 - x

. x - 2

19、化简: x - 2 ÷ x 2 -1 2x + 2 + x 2 + 2x +1 1 x -1

. 20、化简: 3x - 3 ÷ x 2

-1 3x - x +1 1

. x +1

21、化简: (

2 + x + 3

1 ) ÷ 3 - x

x x 2 - 9

. 22、化简: (

x 2 + x - 2 4

) ÷ 2 - x x + 2 . x +1

23、化简:(

x + 2

-

x2- 2x

x -1

) ⋅

x2- 4x + 4

x

4 -x

. 24、化简:(

2x -9

x +3

-x + 3) ÷

x2- 4x + 4

-x - 3

25、化简:

2

+

a -1

a2- 4a + 4

a2-1

÷

a -2

a +1

.25、化简:(

m

-

m - 2

2m

) ÷

m2- 4

m

.

m + 2

27、化简:

b

+

a -b

a

a +b

-ab

b2

-

a2

. 28、化简:

x2- 4

x2+ 2x +1

÷ (x + 2) ⋅

x +1

.

2 -x

29、化简:1- x - 2

÷

x +1

x2- 4

x2+ 2x +1

.30、化简:

x

x2- 2x +1

÷ (

x +1

x2-1

+1)

31、化简:

a

-

a + 2

1

÷

a -1

a + 2

a2- 2a +1

.32、化简:(

2a -b

a +b

-

b

) ÷

a -b

a - 2b

.

a +b

33、化简:(1+

2

) ÷

x -1

x +1

x2- 2x +1

.34、化简:

a2-1

a +1

a2-a

-

a2- 2a +1

ax -a

.

x -1

35、化简:x2-8x +16

x2+ 2x

÷ (

12

x +2

-x + 2) +

1

x +4

. 36、化简:(1-

a

) ÷

x

x2-a2

.

x

37、化简:(

x2

x -1

-x -1) ÷

x

x2-1

.38、化简:(

2a

-

a -1

a

) ÷

a +1

a

a2-1

39、化简:(1+

1

) ÷

x - 2

x2-1

2x -4

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