人教版八年级数学上册分式的加减法练习题精选10.docx

1、人教版八年级数学上册分式的加减法练习题精选109x y 2xxy2 xy2 5 3 x b x by6 7 y y 4x 4x x x9 x9 x9 3 45cd2 4c2d2 x x 5x1 (5x1)2 x 6 x2b2 xb x2x7 x2 x3y 7xx3y2 x3y2 4 12m a 2m ab3 7 b b 8n n 8n n3 n3 n3 2 22c2d2 2cd2 n n 3n1 (3n1)2 x 4 x2b2 xb mm4 m9 x y 4xx3y3 x3y3 4 5 x n x nn9 4 n n 2a 9a 8a a7 a7 a7 2 42c2d2 4cd n n 6n3

2、 (6n3)2 m 2 m2n2 mn aa3 a43x2y 3xx3y3 x3y3 5 1 x3q x3qx5 5 x x 4b 2b 9b b7 b7 b7 3 27c2d 8cd b b 3b8 (3b8)2 a 6 a2n2 an x2x9 x79x4y 6yx3y3 x3y3 1 3 y b y by5 3 y y m m 3m m9 m9 m9 1 14cd2 9cd2 4n 8n 6n2 (6n2)2 b 3 m2b2 mb xx9 x8 x2y 3xx3y2 x3y2 5 32y2q 2y2qb2 5 b b a a a a6 a6 a6 2 22c2d 8cd2 2y y 6

3、y5 (6y5)2 a 4 a2n2 an x2x8 x37x3y 8yxy3 xy3 1 22x2q 2x2qy7 4 y y a a 6a a4 a4 a4 4 28cd2 9c2d2 2m m 5m3 (5m3)2 b 3 a2b2 ab m2m4 m6 x5y 9yx2y x2y 1 3 p2b p2bb4 2 b b 7x 4x x x9 x9 x9 3 42cd2 7cd2 y 3y 6y4 (6y4)2 n 1 a2n2 an aa8 a8 x3y 3xx2y x2y 2 33m3n 3m3ny5 7 y y x 4x x x7 x7 x7 1 17cd2 3cd a a 6a8

4、 (6a8)2 m 4 m2y2 my aa9 a55x y 5xx2y3 x2y3 1 3 x q x qy8 2 y y 4n 5n n n5 n5 n5 3 23c2d 8cd2 n 3n 5n4 (5n4)2 y 4 m2y2 my x2x4 x95x y 5xx2y2 x2y2 3 33m b 3m bn7 7 n n 8n 7n 7n n6 n6 n6 4 45cd 7cd 7y 8y 4y7 (4y7)2 y 4 m2y2 my m2m3 m22x y 3yx3y3 x3y3 5 22p3b 2p3bb6 6 b b x 8x x x5 x5 x5 2 34c2d 8cd 4n

5、7n 6n7 (6n7)2 a 2 a2y2 ay a2a1 a2 x y 3yx3y3 x3y3 3 13m b 3m bn5 1 n n 5m 4m m m4 m4 m4 3 13c2d 6cd2 x x 4x1 (4x1)2 a 6 a2y2 ay xx6 x87x y 6xxy2 xy2 5 5 m a m ab7 7 b b a a a a4 a4 a4 2 23c2d2 9c2d2 7b 7b 2b6 (2b6)2 a 3 a2y2 ay mm8 m9 x y 3xxy2 xy2 5 13m3n 3m3nm9 5 m m 5x 4x 6x x5 x5 x5 1 12cd2 5cd2

6、 x x 3x6 (3x6)2 a 3 a2y2 ay x2x4 x36x5y 2yx2y3 x2y3 4 53x2a 3x2ax1 7 x x 8x 2x 2x x9 x9 x9 2 25c2d2 7cd n n 2n8 (2n8)2 x 5 x2b2 xb m2m6 m96x y 3yx3y2 x3y2 1 32x q 2x qx3 1 x x y y 3y y3 y3 y3 3 28cd2 7c2d b b 3b7 (3b7)2 n 1 a2n2 an aa5 a94x y 7xx3y2 x3y2 1 42x a 2x aa9 7 a a x x 8x x8 x8 x8 2 28c2d2

7、 6cd 4a a 2a7 (2a7)2 a 1 a2n2 an xx9 x8 x8y 7xx3y2 x3y2 4 53m n 3m na1 7 a a 4b 3b b b8 b8 b8 2 16cd2 5cd2 b b 3b5 (3b5)2 m 2 m2y2 my m2m2 m2 x3y 7xx3y3 x3y3 1 33y2q 3y2qy2 2 y y x 5x x x3 x3 x3 4 37cd 5c2d2 m m 2m4 (2m4)2 a 6 a2y2 ay aa8 a6 x5y 5yx3y x3y 5 23m2n 3m2ny1 6 y y b 3b b b9 b9 b9 3 22c2d 9c2d2 9x x 6x2 (6x2)2 m 3 m2y2 my xx6 x25x5y 4yxy2 xy2 5 13m b 3m bn9 3 n n y 2y y y8 y8 y8 1 12c2d 5c2d m 7m 6m4 (6m4)2 x 1 x2n2 xn aa1 a45x8y 6yx3y2 x3y2 2 4 p n p nx4 4 x x 6m 7m 4m