人教版初二数学上册分式的加减法练习题精选8.docx

1、人教版初二数学上册分式的加减法练习题精选87x y 4xx3y2 x3y2 1 53x a 3x am6 7 m m n n 7n n2 n2 n2 3 44c2d2 7c2d b b 5b8 (5b8)2 a 6 a2b2 ab x2x6 x5 x y 9xx2y2 x2y2 5 22y3n 2y3na1 2 a a 7m 2m 7m m4 m4 m4 4 34cd 3c2d n n 3n1 (3n1)2 a 2 a2y2 ay mm4 m8 x y 4yxy xy 1 5 y q y qn7 9 n n m 2m 6m m6 m6 m6 2 26c2d2 2cd2 b b 2b9 (2b9

2、)2 x 6 x2n2 xn m2m3 m9 x8y 8yx2y3 x2y3 1 2 y n y nm6 9 m m 8b b 2b b2 b2 b2 1 46cd 5cd2 y y 5y3 (5y3)2 x 4 x2b2 xb x2x8 x3 x y 9yx3y x3y 5 1 x3a x3an1 4 n n 4y y y y9 y9 y9 2 19cd 4cd2 5n 8n 3n7 (3n7)2 n 4 m2n2 mn aa4 a4 x6y 5yx3y2 x3y2 5 42y n 2y nn8 3 n n x x x x7 x7 x7 2 39cd2 3cd2 2a 6a 3a4 (3a4

3、)2 n 4 a2n2 an xx1 x14x y 9xx3y x3y 2 22x n 2x nb3 8 b b 6a 9a 9a a8 a8 a8 4 13cd2 6cd2 a a 6a5 (6a5)2 y 6 m2y2 my aa5 a8 x y 5yx3y3 x3y3 2 5 x3b x3bb2 9 b b n n 3n n1 n1 n1 2 18c2d 7c2d 7m m 2m2 (2m2)2 x 5 x2n2 xn xx5 x32x y 4yx2y x2y 4 13y q 3y qx2 4 x x 9y y 2y y4 y4 y4 4 12c2d2 8cd2 m 4m 4m8 (4m

4、8)2 a 2 a2n2 an a2a6 a1 x7y 8xx2y2 x2y2 1 1 y3b y3bn5 9 n n 9x x x x6 x6 x6 4 43c2d 5cd 4m 9m 4m6 (4m6)2 y 3 x2y2 xy xx5 x8 x5y 5xxy2 xy2 5 22x2n 2x2nx2 1 x x 6y 6y y y4 y4 y4 3 12cd 6c2d2 b b 2b6 (2b6)2 y 1 m2y2 my a2a1 a4 x4y 9yx3y3 x3y3 5 1 m b m bx1 9 x x 8b 3b b b7 b7 b7 3 47c2d2 2cd 8b 5b 5b7

5、(5b7)2 n 6 m2n2 mn x2x3 x64x y 5yx2y x2y 3 3 p3q p3qy2 4 y y 8m 8m 8m m7 m7 m7 4 23cd 7cd m 5m 5m1 (5m1)2 m 5 m2n2 mn a2a6 a96x y 5yx2y3 x2y3 5 1 p2a p2ab9 3 b b b b 2b b6 b6 b6 3 38c2d 8c2d x 8x 3x7 (3x7)2 x 5 x2n2 xn aa9 a8 x y 4xx3y2 x3y2 1 13p3q 3p3qx3 2 x x m m m m6 m6 m6 4 33c2d 3cd x x 6x6 (6

6、x6)2 n 1 x2n2 xn aa6 a77x8y 3yxy xy 2 33p2b 3p2bn4 1 n n y y 4y y4 y4 y4 2 48c2d 4c2d2 5y 5y 4y5 (4y5)2 a 4 a2b2 ab m2m2 m76x y 4yxy2 xy2 4 23p2b 3p2by3 6 y y a a 9a a3 a3 a3 2 13c2d2 9cd 2b 6b 6b4 (6b4)2 m 1 m2n2 mn xx4 x5 x y 9yx2y3 x2y3 5 3 x a x ay2 9 y y 5y 3y y y2 y2 y2 2 39c2d 6cd2 x 3x 3x6 (

7、3x6)2 b 6 a2b2 ab aa6 a1 x y 9yx3y3 x3y3 2 1 x a x ab7 3 b b y 2y 6y y1 y1 y1 1 25c2d 6c2d2 b 8b 5b8 (5b8)2 x 3 x2y2 xy xx2 x98x y 9yx2y x2y 3 1 x b x ba7 1 a a n 4n 3n n9 n9 n9 3 19cd2 2c2d 5b b 6b5 (6b5)2 a 3 a2y2 ay m2m9 m27x y 7yx2y x2y 4 43p b 3p ba9 3 a a 8n n 3n n3 n3 n3 2 15cd2 3cd x 6x 5x7

8、(5x7)2 y 2 a2y2 ay mm2 m33x6y 3xxy3 xy3 3 32x3a 2x3aa5 9 a a 6a 3a a a7 a7 a7 3 42c2d2 9cd2 y 3y 4y8 (4y8)2 x 2 x2y2 xy xx6 x9 x y 6yxy3 xy3 4 4 x3a x3ab2 1 b b y 6y y y6 y6 y6 1 16c2d 2cd2 n n 4n9 (4n9)2 b 4 m2b2 mb xx4 x98x4y 3yx2y2 x2y2 3 32m2n 2m2ny6 1 y y 8y 8y 3y y8 y8 y8 4 23c2d 2cd2 8b 8b 2b

9、8 (2b8)2 y 4 a2y2 ay mm6 m76x9y 5xx2y3 x2y3 5 42x b 2x bn8 5 n n 2x 5x 9x x5 x5 x5 4 18cd2 5c2d2 7m 4m 3m3 (3m3)2 x 5 x2y2 xy x2x5 x14x3y 2yx2y x2y 1 52y2n 2y2nx8 9 x x 3x 5x 3x x6 x6 x6 2 34c2d2 2c2d a a 3a8 (3a8)2 x 3 x2y2 xy mm7 m62x5y 8yxy3 xy3 2 1 p2n p2nb2 2 b b b 3b b b2 b2 b2 1 15c2d 4c2d m

10、5m 2m8 (2m8)2 n 3 x2n2 xn a2a7 a2 x7y 8yxy3 xy3 4 22y n 2y nx8 2 x x 6x 6x 8x x6 x6 x6 4 47cd 7c2d x 2x 4x8 (4x8)2 b 2 a2b2 ab xx9 x8 x3y 4xx3y2 x3y2 1 32x n 2x na7 7 a a 7x 2x 2x x8 x8 x8 1 43c2d2 8cd2 9b 8b 4b4 (4b4)2 x 2 x2b2 xb xx9 x7 x y 2yxy2 xy2 2 52y n 2y nx9 3 x x y 2y 8y y2 y2 y2 3 36cd 6c

11、2d 4n 3n 3n5 (3n5)2 b 3 x2b2 xb mm3 m53x y 8yx3y x3y 4 5 p q p qb8 2 b b 9x x 5x x7 x7 x7 3 48cd 7cd2 3y 6y 2y3 (2y3)2 x 4 x2b2 xb m2m4 m4 x y 4xx2y x2y 2 33y q 3y qx6 5 x x 8m m m m7 m7 m7 2 39cd2 8cd x 5x 6x7 (6x7)2 n 3 x2n2 xn mm6 m38x8y 7xxy3 xy3 1 13m2n 3m2nm5 5 m m 2a 6a 5a a5 a5 a5 2 26cd2 5c

12、d 2b 2b 3b8 (3b8)2 a 5 a2b2 ab a2a9 a83x y 4yxy3 xy3 2 43p a 3p ay3 4 y y 2x x 7x x5 x5 x5 2 33cd 5c2d 3m 9m 4m4 (4m4)2 m 3 m2b2 mb mm6 m3 x2y 5xx3y3 x3y3 1 5 m q m qx5 1 x x 2b 7b b b6 b6 b6 2 22cd 7c2d 5x 7x 6x2 (6x2)2 a 2 a2b2 ab m2m8 m8 x y 7xx3y3 x3y3 5 32y3a 2y3ab9 8 b b 2y 3y 4y y8 y8 y8 3 46

13、c2d 5c2d m m 2m4 (2m4)2 a 1 a2n2 an aa6 a6 x6y 2yx3y x3y 3 4 y2b y2ba8 4 a a y 4y y y1 y1 y1 2 23cd2 7c2d 2x x 4x2 (4x2)2 y 2 a2y2 ay aa1 a3 x7y 9xxy xy 1 53y q 3y qa9 7 a a 8n n n n8 n8 n8 3 19cd2 5c2d x 6x 3x8 (3x8)2 x 1 x2n2 xn m2m8 m4 x y 4xx2y2 x2y2 4 43m2b 3m2bx1 2 x x 6y 4y y y3 y3 y3 2 32cd2 9c2d2 n 8n 4n8 (4n8)2 x 4 x2b2 xb a2a3 a9 x y 7yxy3 xy3 2 3 m2a m2am9 2 m m 7a a 5a a1 a1 a1 3 16cd2 2cd 9a 9a 5a2 (5a2)2 y 2 a2y2 ay aa3 a4