人教版八年级数学上册分式的加减法练习题44.doc

1、3x3y 6yx2y2 x2y2 5 2 y2q y2qy6 6 y y n n 5n n7 n7 n7 3 14c2d2 4c2d a 6a 5a6 (5a6)2 a 6 a2y2 ay x2x4 x4 x y 5xxy3 xy3 2 53p3a 3p3aa6 3 a a b 9b 7b b5 b5 b5 4 23cd 8c2d2 6a a 3a3 (3a3)2 y 5 m2y2 my m2m2 m7 x y 4xxy xy 3 12m2q 2m2qb4 6 b b 6a 5a a a8 a8 a8 2 13cd2 3c2d m 6m 3m2 (3m2)2 y 6 a2y2 ay a2a9

2、a8 x7y 9xx2y2 x2y2 2 5 p3q p3qx1 9 x x y 4y 8y y7 y7 y7 2 19c2d 9c2d2 n 6n 3n5 (3n5)2 m 3 m2n2 mn mm8 m82x4y 6xx3y2 x3y2 4 43x2n 3x2nb9 8 b b 4y 4y y y1 y1 y1 2 22c2d2 9c2d2 7m m 3m7 (3m7)2 b 1 x2b2 xb aa2 a83x y 7yx3y3 x3y3 4 5 y b y bm5 4 m m a 8a a a7 a7 a7 3 23c2d2 5c2d 9b b 5b1 (5b1)2 m 2 m2y2

3、my mm3 m6 x y 2xx3y2 x3y2 5 1 x b x ba4 6 a a x 6x 3x x4 x4 x4 3 43cd 8c2d2 4n 5n 3n4 (3n4)2 x 6 x2n2 xn x2x6 x8 x8y 5yx2y3 x2y3 5 2 p q p qx8 7 x x x x x x8 x8 x8 1 45cd 3cd2 4m 3m 3m9 (3m9)2 b 1 x2b2 xb m2m6 m4 x y 2xx2y3 x2y3 3 5 p n p nm8 1 m m b 2b 8b b8 b8 b8 1 23cd 4c2d 6n n 3n8 (3n8)2 n 5 m2

4、n2 mn a2a3 a6 x y 7yxy2 xy2 5 52p q 2p qy1 9 y y 4y 8y y y3 y3 y3 3 14c2d 9c2d2 3b b 2b5 (2b5)2 m 1 m2y2 my x2x1 x83x5y 4xx3y2 x3y2 2 1 p q p qa5 4 a a 7n n 2n n8 n8 n8 2 33cd2 9c2d 3a 5a 6a8 (6a8)2 b 4 m2b2 mb a2a8 a55x7y 6xx2y2 x2y2 5 13p2q 3p2qb9 2 b b n 9n n n4 n4 n4 2 28c2d2 5c2d2 5a a 4a9 (4a9

5、)2 a 3 a2b2 ab a2a4 a2 x y 3xx2y x2y 1 4 m3q m3qb8 6 b b 6b 3b 6b b2 b2 b2 4 35cd 9c2d2 6n 4n 3n8 (3n8)2 n 6 m2n2 mn a2a4 a6 x y 3xx3y3 x3y3 5 3 p b p bb7 9 b b x x x x3 x3 x3 2 44cd2 3c2d2 7a a 6a8 (6a8)2 x 3 x2b2 xb m2m8 m5 x y 9xx3y x3y 3 2 p2q p2qx1 7 x x m m m m8 m8 m8 2 46cd 2c2d 7n n 4n6 (4n6

6、)2 b 2 x2b2 xb xx1 x26x y 7xxy3 xy3 3 2 x a x ay6 1 y y 4x x x x9 x9 x9 3 39c2d 8cd2 3y y 6y5 (6y5)2 b 4 x2b2 xb mm8 m8 x6y 4xx2y3 x2y3 3 3 y n y nm9 7 m m a 3a 2a a4 a4 a4 3 45cd2 2c2d2 5y y 2y6 (2y6)2 b 5 m2b2 mb xx1 x38x9y 9xx2y3 x2y3 5 33x3b 3x3bb8 1 b b n n n n8 n8 n8 4 15c2d 3c2d2 9m 6m 4m8 (4

7、m8)2 m 6 m2b2 mb a2a6 a54x3y 3yx3y x3y 4 4 x b x bb5 2 b b b b b b8 b8 b8 3 48c2d 7c2d 4a 3a 5a4 (5a4)2 b 2 a2b2 ab aa4 a7 x9y 9yxy xy 1 1 m3a m3am8 1 m m x x 8x x4 x4 x4 3 46c2d 5c2d 6a 2a 2a2 (2a2)2 n 1 x2n2 xn a2a2 a97x2y 7yxy2 xy2 5 33y2b 3y2bx7 7 x x 4y y y y3 y3 y3 3 46cd2 7c2d2 b b 2b6 (2b6)2

8、 b 3 a2b2 ab a2a3 a83x6y 4xx2y2 x2y2 1 52p a 2p ay5 1 y y 3y y y y5 y5 y5 2 44cd 3cd 5b b 3b8 (3b8)2 n 3 x2n2 xn m2m4 m15x y 8xx2y x2y 1 5 y2n y2nn9 7 n n 9m 5m m m9 m9 m9 1 34cd2 3c2d2 9b 3b 5b3 (5b3)2 m 2 m2n2 mn m2m1 m93x y 3yx3y2 x3y2 5 32p3n 2p3nm8 5 m m 6b b 8b b7 b7 b7 4 37cd 8c2d2 6y y 5y7 (

9、5y7)2 y 4 m2y2 my a2a9 a24x3y 3yxy xy 2 43m3b 3m3by8 8 y y y 6y y y3 y3 y3 1 13cd2 8c2d2 b 2b 2b8 (2b8)2 m 1 m2b2 mb mm5 m34x4y 7yxy xy 3 1 y3q y3qa4 3 a a 5n n 2n n4 n4 n4 1 47cd 5cd 8y y 2y1 (2y1)2 b 6 x2b2 xb xx1 x1 x y 3yxy3 xy3 2 5 x2q x2qb7 4 b b m 5m 7m m7 m7 m7 1 36c2d2 5cd2 x x 4x8 (4x8)2 x

10、 6 x2n2 xn m2m6 m52x y 5yxy xy 3 5 m n m nx4 1 x x 7b b b b7 b7 b7 1 46cd2 7cd n 8n 4n4 (4n4)2 a 2 a2y2 ay a2a4 a6 x y 9yxy3 xy3 2 4 x n x nn3 9 n n n 7n n n5 n5 n5 3 39c2d2 9c2d2 8x x 5x7 (5x7)2 n 1 x2n2 xn x2x8 x6 x6y 2yxy2 xy2 5 2 p2a p2ax4 1 x x 3m 7m 3m m8 m8 m8 1 44c2d 2cd2 3x 6x 2x4 (2x4)2 n

11、1 m2n2 mn a2a1 a15x y 8xx2y x2y 1 33y3b 3y3bb4 2 b b n 8n n n2 n2 n2 2 14c2d2 9c2d2 8m 3m 2m4 (2m4)2 a 3 a2b2 ab aa1 a24x6y 9yx3y x3y 4 5 p n p nm7 4 m m 7b 4b 3b b7 b7 b7 2 43c2d 7cd2 a a 6a8 (6a8)2 a 3 a2n2 an x2x2 x4 x y 3xx3y2 x3y2 4 23m2b 3m2by8 5 y y a 4a 8a a6 a6 a6 1 48c2d 3cd b 2b 3b6 (3b6)

12、2 y 5 x2y2 xy xx4 x88x y 5xxy3 xy3 5 5 p b p ba7 4 a a a 8a a a9 a9 a9 2 45c2d2 6cd2 b b 4b1 (4b1)2 n 2 m2n2 mn aa4 a17x y 3xx2y x2y 3 22m2n 2m2nx8 2 x x y 2y y y4 y4 y4 3 22cd 8cd 4n n 6n5 (6n5)2 n 2 a2n2 an xx6 x2 x3y 8xxy xy 3 23p q 3p qx9 7 x x y y y y3 y3 y3 4 44c2d 4c2d x x 2x9 (2x9)2 x 6 x2y2

13、 xy aa3 a1 x9y 9yx3y3 x3y3 5 4 m q m qx5 9 x x 7a 2a 5a a5 a5 a5 4 27cd 4c2d y 3y 6y4 (6y4)2 b 6 x2b2 xb mm4 m5 x y 9yx3y x3y 3 13m3q 3m3qx7 7 x x 5y 5y y y2 y2 y2 4 16c2d 9c2d y 6y 3y6 (3y6)2 b 5 a2b2 ab m2m7 m1 x y 3xxy2 xy2 3 4 m b m by1 7 y y a a 5a a5 a5 a5 3 12cd 9cd2 4y y 4y2 (4y2)2 n 3 m2n2 mn mm4 m6 x6y 3xxy2 xy2 4 1 x2q x2qa7 5 a a 5y 9y y y1 y1 y1 2 43cd2 6c2d 2m m 4m1 (4m1)2 y 5 x2y2 xy aa6 a5