人教版初二数学上册分式的加减法练习题精选74.docx

1、人教版初二数学上册分式的加减法练习题精选745x4y 2xx3y x3y 3 23p q 3p qa1 3 a a 2n n n n4 n4 n4 2 15cd 5cd2 4m 7m 6m1 (6m1)2 b 1 a2b2 ab xx2 x8 x y 4yx2y3 x2y3 4 23p q 3p qa4 4 a a 4b 9b b b8 b8 b8 2 19c2d2 6cd 5n 6n 4n1 (4n1)2 n 6 a2n2 an a2a6 a82x y 2xx2y2 x2y2 4 53m3a 3m3ax9 1 x x 5x x x x5 x5 x5 2 22cd2 6c2d2 a 3a 2a

2、8 (2a8)2 n 5 x2n2 xn m2m4 m5 x9y 4xx3y3 x3y3 1 13y2n 3y2ny2 2 y y 8m m 9m m3 m3 m3 3 16cd 4cd 5x 9x 3x7 (3x7)2 b 1 m2b2 mb m2m6 m25x y 2xx3y3 x3y3 1 3 p n p ny7 3 y y b 4b b b4 b4 b4 4 45cd 8cd 6b b 2b8 (2b8)2 a 6 a2y2 ay m2m8 m85x y 9xx2y3 x2y3 5 43p2n 3p2nn3 7 n n 9y y y y9 y9 y9 4 47c2d2 4c2d 2y

3、2y 5y1 (5y1)2 m 5 m2y2 my x2x6 x12x2y 3xx3y x3y 4 1 x3q x3qb2 5 b b a a 8a a8 a8 a8 1 26cd2 5cd a 9a 4a4 (4a4)2 b 6 a2b2 ab mm7 m97x4y 5yxy3 xy3 2 42m a 2m an9 9 n n b 2b 6b b6 b6 b6 1 17cd2 7cd n 7n 4n2 (4n2)2 x 5 x2n2 xn x2x8 x76x3y 4xxy2 xy2 1 1 x a x aa3 7 a a a a a a9 a9 a9 2 24c2d2 5cd 8x 8x 5

4、x6 (5x6)2 a 3 a2b2 ab x2x4 x5 x y 2xx2y2 x2y2 1 1 p b p bn5 7 n n 8x x 9x x1 x1 x1 4 18c2d2 8c2d 6n 6n 4n6 (4n6)2 x 2 x2n2 xn xx1 x96x y 9yx3y3 x3y3 1 13p3n 3p3nb5 3 b b a 5a 9a a8 a8 a8 2 49cd 3cd2 8x x 3x1 (3x1)2 x 3 x2y2 xy xx2 x52x y 8yx3y2 x3y2 4 12p a 2p ab7 9 b b m 2m 6m m9 m9 m9 4 28c2d2 7cd

5、2 a a 5a3 (5a3)2 m 5 m2n2 mn aa5 a4 x3y 8yx2y2 x2y2 4 2 p2q p2qa5 8 a a m m 9m m5 m5 m5 1 27cd2 3cd y 4y 6y4 (6y4)2 b 3 m2b2 mb x2x3 x95x5y 8xx3y x3y 5 3 y q y qa1 8 a a 4b 6b b b8 b8 b8 2 23c2d 6c2d2 y 2y 5y3 (5y3)2 y 2 a2y2 ay x2x6 x9 x y 4yx3y2 x3y2 2 32x q 2x qn1 7 n n x 9x 4x x1 x1 x1 2 32c2d2

6、4cd2 6n n 6n4 (6n4)2 b 1 x2b2 xb a2a2 a8 x5y 7xx2y2 x2y2 3 42x3n 2x3na9 5 a a 4x x x x7 x7 x7 1 43c2d2 7cd2 y y 2y2 (2y2)2 n 5 a2n2 an xx1 x77x y 6yx2y2 x2y2 1 5 m2q m2qx1 3 x x 9m m m m8 m8 m8 1 44cd2 3cd2 b b 2b6 (2b6)2 y 3 m2y2 my aa4 a24x6y 6yx3y2 x3y2 2 12p b 2p bn1 3 n n a 5a 9a a6 a6 a6 1 28c

7、d 2c2d 5n 6n 4n1 (4n1)2 m 4 m2y2 my m2m1 m2 x5y 7xxy xy 1 4 y n y nm5 8 m m m m 7m m2 m2 m2 3 39cd 9cd 8x 4x 3x6 (3x6)2 b 1 m2b2 mb xx9 x5 x5y 6xx2y2 x2y2 3 23p n 3p nm1 9 m m a a 5a a5 a5 a5 4 47cd2 9c2d b b 3b3 (3b3)2 b 3 m2b2 mb x2x2 x7 x2y 3yx3y2 x3y2 5 5 p2n p2nm4 5 m m y 5y y y7 y7 y7 1 19cd 3

8、cd 5b 4b 5b5 (5b5)2 b 3 x2b2 xb aa6 a27x y 3yxy xy 4 3 y2a y2an8 2 n n 7n n 5n n3 n3 n3 1 27c2d2 9cd2 4x x 2x6 (2x6)2 y 2 x2y2 xy aa1 a6 x8y 3xx3y x3y 1 1 p2b p2by1 3 y y 7b 8b b b7 b7 b7 3 19c2d 4c2d y y 5y5 (5y5)2 b 3 x2b2 xb x2x2 x3 x3y 8xx2y x2y 1 5 m a m ab3 9 b b x x x x6 x6 x6 2 14cd2 9c2d2 5

9、b 9b 4b3 (4b3)2 y 5 a2y2 ay a2a7 a14x9y 2yx2y3 x2y3 2 5 m2n m2nm6 3 m m 2x x x x3 x3 x3 4 28cd2 8cd y 4y 4y3 (4y3)2 m 3 m2n2 mn m2m3 m19x y 3yx2y2 x2y2 3 4 p n p na8 6 a a 4m m 5m m5 m5 m5 3 47cd2 5c2d y 2y 6y1 (6y1)2 b 2 m2b2 mb a2a8 a9 x y 5xx3y3 x3y3 4 33x3q 3x3qb4 9 b b n 9n 7n n6 n6 n6 1 34cd 7

10、c2d2 n n 2n7 (2n7)2 m 5 m2y2 my x2x8 x9 x8y 6xx2y2 x2y2 5 2 x b x ba4 1 a a a a a a5 a5 a5 3 38cd 2cd m m 4m3 (4m3)2 m 2 m2n2 mn aa1 a5 x y 2xx2y x2y 2 43y3a 3y3ax5 6 x x y 9y y y8 y8 y8 2 15cd 3cd2 7m 7m 4m5 (4m5)2 n 4 a2n2 an m2m7 m4 x2y 9yx3y3 x3y3 2 3 m2a m2ay7 5 y y 6n n n n3 n3 n3 4 15c2d 9c2d

11、 6x x 3x4 (3x4)2 x 5 x2b2 xb mm9 m4 x6y 6xx3y3 x3y3 2 22x3a 2x3ax1 4 x x a 8a 7a a4 a4 a4 1 48c2d2 7c2d2 6y y 2y9 (2y9)2 b 2 x2b2 xb a2a3 a7 x y 7yxy xy 5 12p3n 2p3nx4 2 x x b 2b 7b b8 b8 b8 4 17c2d2 6cd x 7x 4x4 (4x4)2 y 3 a2y2 ay mm8 m7 x y 5yx3y2 x3y2 5 4 m n m nx8 2 x x n 3n 5n n6 n6 n6 3 49c2d

12、6c2d2 5m 4m 5m3 (5m3)2 n 6 m2n2 mn xx9 x7 x y 3yxy3 xy3 3 33x2n 3x2na8 8 a a 4x x 3x x9 x9 x9 4 26c2d 9c2d2 8y y 3y6 (3y6)2 n 2 m2n2 mn mm2 m49x y 6yx3y3 x3y3 2 1 m2a m2ay4 6 y y y y 7y y5 y5 y5 4 28cd2 2cd y y 5y7 (5y7)2 x 3 x2n2 xn a2a8 a7 x y 4xx2y2 x2y2 4 52x3b 2x3ba8 2 a a n n 3n n4 n4 n4 4 17c

13、2d 7c2d2 6x 2x 2x4 (2x4)2 b 4 a2b2 ab xx9 x2 x y 7yx2y x2y 3 13y q 3y qy2 8 y y 3n 2n n n9 n9 n9 3 36cd2 7c2d2 y 7y 6y4 (6y4)2 y 3 a2y2 ay x2x4 x64x y 2yx3y3 x3y3 5 53y a 3y ab4 5 b b 3y 5y 8y y4 y4 y4 1 17c2d2 3c2d2 6m 4m 5m3 (5m3)2 n 4 x2n2 xn a2a8 a7 x y 4yx2y x2y 5 13m n 3m nb1 6 b b 9b b 9b b5 b5 b5 3 24c2d2 8cd y 8y 5y1 (5y1)2 m 3 m2n2 mn mm2 m88x y 2yxy xy 2 1 x q x qy5 1 y y a a a a9 a9 a9 1 49cd2 6cd2 9a a 2a4 (2a4)2 x 2 x2y2 xy x2x5 x1