人教版初二数学上册分式的加减法练习题精选42.docx

1、人教版初二数学上册分式的加减法练习题精选42x3y 9yxy2 xy2 4 23x a 3x aa2 2 a a 5n 6n 9n n9 n9 n9 4 36c2d 8c2d2 7b b 3b9 (3b9)2 n 1 a2n2 an xx4 x7 x y 5yxy xy 5 12m a 2m aa1 5 a a 9m m 2m m5 m5 m5 1 47c2d 7c2d2 b 5b 2b5 (2b5)2 y 4 x2y2 xy a2a9 a8 x y 8yxy3 xy3 3 13x3n 3x3na8 3 a a 7n 3n n n2 n2 n2 4 38c2d 7cd 3y y 4y8 (4y

2、8)2 m 6 m2y2 my m2m8 m36x5y 5yxy2 xy2 4 53m3n 3m3nm6 9 m m 8x 5x 9x x2 x2 x2 2 47c2d 7c2d n 7n 5n8 (5n8)2 n 6 a2n2 an x2x9 x66x3y 2xxy3 xy3 3 5 m a m am3 5 m m 3n 6n 7n n1 n1 n1 3 39c2d 3c2d2 b 8b 5b9 (5b9)2 a 1 a2b2 ab xx1 x7 x y 6xx2y x2y 3 4 y a y ay1 8 y y 4b 8b 8b b5 b5 b5 2 44c2d2 9cd 6a 8a 4a

3、5 (4a5)2 y 2 x2y2 xy mm8 m83x3y 2xx3y3 x3y3 5 2 m q m qm5 5 m m m 5m m m5 m5 m5 1 36c2d 8c2d 4n n 4n3 (4n3)2 y 6 x2y2 xy a2a3 a97x y 8yx3y3 x3y3 2 4 m n m na9 6 a a m 8m m m5 m5 m5 4 16c2d 2c2d2 9m m 6m9 (6m9)2 a 4 a2y2 ay m2m7 m3 x y 6xx3y2 x3y2 5 53m2a 3m2ay6 6 y y 3b b b b7 b7 b7 3 16c2d2 2c2d x

4、2x 5x2 (5x2)2 a 1 a2y2 ay xx4 x8 x9y 8yxy3 xy3 4 2 y q y qx1 3 x x a 4a 2a a5 a5 a5 1 12c2d 2cd2 5m m 4m6 (4m6)2 n 6 a2n2 an x2x9 x27x4y 2yx3y2 x3y2 3 13y n 3y nn2 1 n n 6n n 8n n7 n7 n7 4 29cd 2cd a a 3a1 (3a1)2 b 3 a2b2 ab xx6 x3 x y 7xx3y3 x3y3 2 3 y3q y3qa1 4 a a 4m 6m 8m m4 m4 m4 3 48c2d 7c2d2

5、m m 2m7 (2m7)2 a 1 a2n2 an aa7 a32x y 3xx2y3 x2y3 2 13m2a 3m2am9 8 m m x 5x x x4 x4 x4 4 35cd2 9c2d 6a 8a 3a5 (3a5)2 x 1 x2b2 xb aa9 a65x y 2xxy3 xy3 2 5 x2a x2aa6 5 a a 3y 3y y y1 y1 y1 4 48cd2 2c2d y y 4y1 (4y1)2 y 1 m2y2 my mm2 m5 x4y 7yx3y3 x3y3 4 42y3q 2y3qm2 8 m m b 8b 4b b4 b4 b4 4 15cd2 5c2d

6、 9x x 6x8 (6x8)2 x 6 x2n2 xn a2a9 a45x9y 7yx3y2 x3y2 1 3 y b y bx9 9 x x 7n 3n 8n n5 n5 n5 3 47cd2 2c2d2 a 6a 2a7 (2a7)2 y 2 a2y2 ay x2x1 x77x y 5xxy xy 4 12x q 2x qb5 3 b b 7b 4b b b6 b6 b6 2 43c2d2 3c2d2 4y y 4y2 (4y2)2 b 4 a2b2 ab mm6 m8 x y 9xxy3 xy3 4 1 y2b y2bm3 4 m m b 8b 3b b8 b8 b8 2 39cd 4

7、cd b 6b 3b8 (3b8)2 b 1 a2b2 ab a2a3 a7 x6y 9yx2y3 x2y3 5 3 y b y bb1 7 b b m 6m m m8 m8 m8 3 17c2d 6c2d b b 2b9 (2b9)2 n 6 a2n2 an xx6 x36x y 8yxy2 xy2 5 4 x n x nm1 8 m m a 3a a a3 a3 a3 1 49c2d 5c2d 2n 3n 4n9 (4n9)2 a 5 a2y2 ay x2x1 x73x3y 5xx2y3 x2y3 3 5 m a m ay3 5 y y n n 5n n7 n7 n7 1 46cd 6cd2 n n 5n9 (5n9)2 n 2 x2n2 xn x2x8 x8 x5y 5xx3y2 x3y2 5 5 p a p ay9 3 y y 6n n 3n n9 n9 n9 2 32c2d2 2cd2 2b b 2b8 (2b8)2 b 4 x2b2 xb x2x8 x42x2y 6xx3y x3y 5 4 x n x nn3 7 n n 5x x x