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1、人教版八年级数学上册分式的加减法练习题精选5x5y 6xx2y2 x2y2 1 52y n 2y nx3 6 x x n n n n9 n9 n9 2 36c2d 8cd 8m 4m 3m7 (3m7)2 m 6 m2n2 mn mm2 m1 x y 9xx2y2 x2y2 3 1 m q m qa9 1 a a 8x x x x2 x2 x2 1 43cd 8cd 9x 8x 6x4 (6x4)2 y 3 m2y2 my mm1 m75x y 9yxy2 xy2 2 23m3n 3m3na3 4 a a 3a a 7a a1 a1 a1 4 38cd2 3c2d2 7m 8m 2m4 (2m
2、4)2 a 4 a2n2 an mm4 m3 x8y 9xxy2 xy2 2 5 p n p na8 8 a a 2m 6m m m3 m3 m3 1 24cd2 6c2d n n 6n6 (6n6)2 n 3 m2n2 mn mm4 m45x y 8yx2y2 x2y2 4 2 y n y nm5 7 m m a a 7a a8 a8 a8 2 14c2d 5c2d 4b b 6b3 (6b3)2 m 6 m2y2 my m2m9 m44x y 4yxy2 xy2 1 1 m q m qx2 3 x x b b 7b b6 b6 b6 1 17cd2 8cd2 y 3y 6y2 (6y2)2
3、 x 1 x2y2 xy a2a1 a1 x y 3yxy xy 1 43x n 3x nn1 4 n n a a 4a a6 a6 a6 4 26c2d 2cd2 9n n 3n4 (3n4)2 a 6 a2n2 an mm7 m1 x y 7yx3y2 x3y2 4 12m2q 2m2qm8 9 m m y y y y2 y2 y2 2 34c2d 7cd 4n n 3n2 (3n2)2 n 1 m2n2 mn a2a8 a8 x y 5xxy xy 2 52p n 2p nb6 7 b b n 4n 9n n1 n1 n1 1 13cd2 4cd 5n 9n 2n3 (2n3)2 y 3
4、 a2y2 ay x2x9 x12x8y 7xx2y2 x2y2 5 53p3a 3p3ax7 4 x x 9m m m m5 m5 m5 4 39cd2 8c2d 8m m 5m6 (5m6)2 n 6 x2n2 xn m2m7 m43x y 2yx3y2 x3y2 4 33m q 3m qn9 3 n n 8m 5m m m7 m7 m7 1 34cd2 4cd2 n n 6n9 (6n9)2 a 1 a2y2 ay m2m2 m72x y 3xx3y3 x3y3 2 22m2a 2m2aa3 5 a a m m m m5 m5 m5 3 42cd 9cd2 y 9y 3y2 (3y2)2
5、 x 2 x2y2 xy a2a9 a65x2y 2yxy xy 4 4 m3a m3aa1 6 a a 7x 2x 6x x9 x9 x9 4 28c2d 3cd2 2a 8a 3a1 (3a1)2 n 4 x2n2 xn m2m3 m12x8y 2yxy2 xy2 1 12p a 2p an8 9 n n y 6y 4y y2 y2 y2 3 49cd 2c2d 4x 4x 5x3 (5x3)2 x 3 x2n2 xn xx1 x85x y 6yx3y x3y 1 4 x2b x2bn5 3 n n 7x x x x3 x3 x3 1 27c2d 7cd a 3a 5a7 (5a7)2 a 5 a2b2 ab m2m4 m3 x y 9xx3y3 x3y3 1 1 m a m ay9 5 y y 2m 9m m m2 m2 m2 3 22c2d2 4cd y y 2y6 (2y6)2 x 5 x2y2 xy xx5 x74x8y 3x
