人教版初二数学上册分式的加减法练习题精选70.docx

1、人教版初二数学上册分式的加减法练习题精选70x9y 8yxy2 xy2 5 52x2b 2x2bb6 9 b b 5y y y y9 y9 y9 2 19c2d 7cd 9n n 6n5 (6n5)2 n 6 x2n2 xn aa2 a62x2y 3xxy3 xy3 3 43m n 3m nm5 7 m m 7b b b b3 b3 b3 2 17cd 9cd 5a a 3a2 (3a2)2 n 1 a2n2 an a2a3 a79x7y 6xx2y x2y 4 1 p a p ay1 6 y y 3b 4b b b5 b5 b5 2 48cd 4cd2 y y 4y6 (4y6)2 y 3

2、m2y2 my xx6 x3 x y 5yx2y x2y 2 53p q 3p qn1 2 n n x x 7x x7 x7 x7 1 35c2d2 7c2d n 3n 2n8 (2n8)2 y 2 x2y2 xy aa8 a14x3y 5xx3y x3y 3 53m2a 3m2an1 9 n n 8b 5b b b7 b7 b7 3 28c2d2 8c2d 5x 4x 6x4 (6x4)2 y 4 m2y2 my mm4 m8 x y 3yx2y x2y 3 3 y3q y3qa2 1 a a 7a 4a 3a a7 a7 a7 3 12c2d2 6cd2 a 2a 2a5 (2a5)2 b

3、 2 x2b2 xb m2m3 m45x y 3yxy2 xy2 4 32y3b 2y3by9 4 y y n 9n 3n n4 n4 n4 1 49c2d 5c2d a 6a 4a7 (4a7)2 y 5 a2y2 ay a2a9 a15x y 7yx3y3 x3y3 2 22y2q 2y2qn7 7 n n y y 6y y9 y9 y9 4 28cd 7c2d2 m m 2m1 (2m1)2 y 3 a2y2 ay x2x6 x8 x y 4xx2y2 x2y2 3 5 m3a m3aa1 2 a a 9a a a a6 a6 a6 3 39cd2 7c2d y 6y 6y8 (6y8)

4、2 a 6 a2n2 an mm3 m35x9y 9xxy xy 4 52x q 2x qm2 5 m m y 2y y y3 y3 y3 3 34c2d 6cd 8a 2a 2a1 (2a1)2 a 5 a2b2 ab aa1 a35x y 9xx3y x3y 1 52m n 2m nm3 5 m m n n n n5 n5 n5 4 37c2d2 9cd a 6a 2a3 (2a3)2 a 3 a2n2 an aa6 a37x8y 6yxy3 xy3 4 4 p3a p3aa4 7 a a a a 6a a1 a1 a1 3 49c2d 7c2d2 n n 3n4 (3n4)2 b 5 a

5、2b2 ab xx9 x8 x y 8yx2y3 x2y3 3 3 m3q m3qy9 5 y y 6b 8b b b2 b2 b2 2 14c2d 2c2d2 y 9y 5y1 (5y1)2 y 6 m2y2 my mm3 m63x6y 7yx2y x2y 3 4 p b p bm2 2 m m 2a a a a8 a8 a8 4 16cd 7cd n n 2n3 (2n3)2 y 5 m2y2 my xx8 x77x y 4yx2y x2y 5 42m2b 2m2ba5 4 a a 5b b b b7 b7 b7 1 25c2d 4cd2 a a 4a3 (4a3)2 b 3 x2b2 x

6、b aa8 a9 x4y 9yxy2 xy2 3 33m2b 3m2bm7 3 m m m 8m 9m m2 m2 m2 2 25c2d2 2c2d 9x x 2x9 (2x9)2 n 4 x2n2 xn a2a3 a1 x y 6xx2y x2y 4 43y3q 3y3qm1 9 m m 9x 4x x x1 x1 x1 2 49cd 9c2d x 8x 4x9 (4x9)2 y 6 x2y2 xy a2a2 a6 x y 5yxy3 xy3 1 5 y n y nx5 4 x x 4x x x x9 x9 x9 1 26cd 7c2d2 b 3b 6b8 (6b8)2 a 2 a2y2 a

7、y mm3 m16x2y 3yx3y3 x3y3 4 4 y a y aa7 4 a a a a 6a a6 a6 a6 2 38c2d2 3cd 3x x 4x1 (4x1)2 y 4 x2y2 xy xx4 x49x4y 9xx2y2 x2y2 3 3 m a m am6 7 m m 3b 4b b b1 b1 b1 1 35cd2 9cd2 5a 6a 2a8 (2a8)2 y 6 m2y2 my x2x8 x3 x3y 5yx3y x3y 2 4 y n y na8 4 a a 3n 3n 5n n3 n3 n3 1 22c2d 5c2d b b 6b7 (6b7)2 y 2 a2y2

8、 ay aa6 a4 x9y 7xx3y2 x3y2 2 5 m3b m3by6 1 y y 8b b b b6 b6 b6 2 46c2d2 9c2d 2y y 5y5 (5y5)2 m 6 m2y2 my xx8 x7 x y 4xxy2 xy2 4 32p a 2p ab6 4 b b 9m 4m 4m m2 m2 m2 2 29c2d 5cd2 x 4x 6x9 (6x9)2 y 6 m2y2 my m2m3 m63x y 8yx3y2 x3y2 2 42m3q 2m3qy1 1 y y 6a a a a4 a4 a4 4 32c2d2 2c2d2 y y 4y3 (4y3)2 a 2

9、 a2y2 ay m2m6 m3 x5y 6xx2y x2y 5 12y a 2y an3 9 n n x 7x 3x x2 x2 x2 3 38c2d2 3cd a 8a 4a2 (4a2)2 b 2 a2b2 ab xx6 x88x8y 5yxy3 xy3 3 5 p3b p3bb4 6 b b 3b 8b b b9 b9 b9 1 13cd2 9c2d a 9a 5a9 (5a9)2 y 6 m2y2 my aa4 a43x6y 3xxy xy 1 53x n 3x nx4 2 x x n 2n n n3 n3 n3 4 42cd 6cd2 y y 2y4 (2y4)2 a 3 a2b2

10、 ab xx5 x5 x y 4xx3y2 x3y2 1 43m3a 3m3ab7 5 b b 8x 5x 4x x5 x5 x5 3 39cd 5c2d n 8n 3n8 (3n8)2 y 6 m2y2 my a2a2 a18x6y 8yx3y3 x3y3 3 4 m3n m3na3 4 a a 2b 7b b b9 b9 b9 4 25c2d 7cd n n 4n8 (4n8)2 a 4 a2b2 ab xx6 x5 x y 9xxy xy 1 3 m3b m3bm8 2 m m y 4y 7y y7 y7 y7 4 29cd2 7c2d b b 3b7 (3b7)2 y 4 x2y2 x

11、y a2a2 a42x4y 4xxy3 xy3 2 33y n 3y nn8 1 n n 4m m m m9 m9 m9 4 15cd2 7cd m m 4m9 (4m9)2 a 6 a2b2 ab aa3 a4 x9y 6yx2y2 x2y2 3 3 x a x ab1 5 b b a 7a 2a a9 a9 a9 2 37cd2 3cd 5m m 5m8 (5m8)2 a 3 a2b2 ab aa1 a38x y 3yx3y x3y 4 4 m q m qn5 5 n n 2b 5b 7b b9 b9 b9 2 29c2d2 2cd2 y 7y 2y2 (2y2)2 m 6 m2b2 mb

12、 m2m5 m6 x y 8xxy2 xy2 3 42x2n 2x2nn1 2 n n a 2a a a6 a6 a6 3 44cd2 6c2d2 2b b 6b7 (6b7)2 m 2 m2b2 mb m2m9 m3 x y 5yx3y3 x3y3 2 42p b 2p bn8 3 n n 5y y 4y y7 y7 y7 4 35c2d 9c2d 9x 9x 4x8 (4x8)2 a 1 a2n2 an m2m2 m7 x5y 2xxy2 xy2 4 33p3n 3p3nb2 7 b b 6m m 5m m2 m2 m2 2 23cd 3cd2 m 8m 3m9 (3m9)2 x 5 x2

13、b2 xb mm6 m74x y 6yx3y x3y 1 3 m b m bn5 4 n n x 9x 4x x2 x2 x2 1 25c2d2 6cd 8b 5b 3b7 (3b7)2 y 3 m2y2 my x2x1 x6 x y 7yx3y x3y 1 13x a 3x ab1 8 b b y y 6y y6 y6 y6 2 36cd2 3c2d 9y 3y 5y3 (5y3)2 n 3 x2n2 xn mm1 m57x y 4yx2y2 x2y2 1 5 m q m qb7 4 b b x 9x 8x x4 x4 x4 1 15c2d 3c2d y y 3y2 (3y2)2 b 4 m2b2 mb mm7 m1 x3y 4xxy xy 3 23x3b 3x3bx4 3 x x x 9x x x2 x2 x2 1 25c2d2 6c2d 3b 6b 4b4 (4b4)2 y 6 a2y2 ay m2m8 m1