人教版八年级数学上册分式的加减法练习题精选30.docx

1、人教版八年级数学上册分式的加减法练习题精选308x8y 5yx3y2 x3y2 2 52m q 2m qn8 4 n n m 2m 8m m5 m5 m5 3 23c2d 3c2d b b 6b7 (6b7)2 n 6 m2n2 mn aa7 a7 x y 9yx2y2 x2y2 3 33y2q 3y2qy9 9 y y 4y 5y 3y y7 y7 y7 1 35c2d2 5cd 3m 4m 4m1 (4m1)2 a 2 a2y2 ay a2a8 a23x y 5xxy2 xy2 5 4 p q p qn3 5 n n 7m m m m7 m7 m7 4 32cd 4c2d2 a 6a 3a

2、6 (3a6)2 a 3 a2n2 an a2a5 a45x6y 2xx2y2 x2y2 5 43y n 3y nm3 4 m m x 9x x x7 x7 x7 4 43cd 6cd 3x x 2x3 (2x3)2 n 2 a2n2 an m2m7 m6 x7y 8yxy2 xy2 3 2 y3b y3bm4 8 m m 7m 7m 2m m3 m3 m3 1 38c2d 4c2d2 5a 4a 5a9 (5a9)2 m 5 m2y2 my m2m7 m58x y 4yxy xy 4 2 p2b p2bm4 4 m m 5m 4m m m4 m4 m4 4 35cd2 9c2d2 6y y

3、5y4 (5y4)2 m 6 m2b2 mb m2m7 m14x y 2xx3y2 x3y2 1 1 x b x ba8 1 a a 5m 7m 8m m4 m4 m4 2 26cd2 3c2d2 b b 6b3 (6b3)2 x 1 x2y2 xy xx7 x9 x3y 2xx3y3 x3y3 4 53m a 3m ab8 1 b b n n n n8 n8 n8 4 19cd 2cd b 4b 4b3 (4b3)2 m 6 m2n2 mn a2a4 a5 x y 2yx3y x3y 3 3 x q x qb9 2 b b 7b b b b2 b2 b2 3 36c2d 3cd2 5m m

4、6m8 (6m8)2 x 3 x2n2 xn aa2 a24x y 7xx2y2 x2y2 4 3 x b x ba3 4 a a 7b 3b b b6 b6 b6 1 12c2d 6c2d 2m 8m 4m5 (4m5)2 x 4 x2b2 xb m2m2 m7 x5y 4xx3y3 x3y3 2 13x3n 3x3nb1 7 b b x x 8x x6 x6 x6 2 37c2d 5cd 8b b 2b5 (2b5)2 a 1 a2y2 ay xx5 x4 x7y 5xx2y2 x2y2 5 2 x2b x2bm7 3 m m 7n n 8n n1 n1 n1 4 26c2d 7c2d2

5、a a 2a1 (2a1)2 a 2 a2y2 ay xx4 x88x y 3xxy2 xy2 2 3 p2n p2nx3 2 x x b b 6b b4 b4 b4 4 47c2d 3cd 7x x 4x6 (4x6)2 a 2 a2n2 an xx3 x8 x y 6xx2y x2y 2 4 y2a y2ax5 8 x x 9n n 6n n8 n8 n8 4 43cd 5cd m m 4m8 (4m8)2 a 1 a2y2 ay aa2 a7 x2y 6yxy3 xy3 3 3 x n x nm7 5 m m 6n n 4n n6 n6 n6 2 44cd 2c2d 2y y 4y5 (

6、4y5)2 x 6 x2b2 xb a2a8 a32x y 6yx2y3 x2y3 3 33p b 3p bm8 3 m m 9y 5y y y7 y7 y7 4 35c2d2 8c2d n n 5n5 (5n5)2 x 2 x2n2 xn xx2 x5 x2y 2xx2y x2y 5 22p3q 2p3qb5 5 b b 7m 2m m m5 m5 m5 3 22cd 9cd2 a a 3a7 (3a7)2 x 2 x2n2 xn a2a2 a4 x9y 4yxy3 xy3 5 4 x2a x2am1 9 m m n 2n 8n n3 n3 n3 3 38c2d2 5cd2 9a 9a 2a

7、1 (2a1)2 a 4 a2b2 ab xx8 x33x2y 5yx2y3 x2y3 1 42x3b 2x3bn2 8 n n 4x 8x x x4 x4 x4 4 35c2d 6cd2 5m m 3m1 (3m1)2 x 4 x2n2 xn a2a5 a77x y 8yx3y x3y 4 3 x b x bm8 1 m m 6y y 9y y7 y7 y7 1 32c2d2 4cd2 7n 7n 2n8 (2n8)2 y 3 a2y2 ay xx7 x22x y 3xx3y3 x3y3 1 3 m n m nm7 8 m m a a a a1 a1 a1 4 29cd 9cd2 3m 4m

8、 4m4 (4m4)2 a 1 a2y2 ay xx8 x13x y 2xxy3 xy3 2 23x2n 3x2nb1 9 b b n 5n 5n n1 n1 n1 1 42c2d 8cd2 7x x 3x2 (3x2)2 a 1 a2n2 an xx5 x52x9y 9yx2y2 x2y2 4 2 m q m qx1 6 x x 3n n n n5 n5 n5 2 26cd2 8cd2 a a 6a6 (6a6)2 n 3 a2n2 an x2x8 x57x7y 5yx3y x3y 2 12p2n 2p2nn7 6 n n 7b 8b 6b b9 b9 b9 1 38cd2 4c2d 6n

9、9n 5n2 (5n2)2 x 3 x2b2 xb a2a2 a32x y 6xx3y x3y 5 33p2q 3p2qn6 4 n n y 4y 3y y2 y2 y2 2 33c2d 5c2d2 8n n 5n2 (5n2)2 x 6 x2n2 xn xx9 x82x y 5xx2y3 x2y3 1 43m q 3m qn8 4 n n 3b b b b5 b5 b5 2 47cd 8cd2 y y 6y6 (6y6)2 a 4 a2b2 ab x2x6 x48x y 7xx3y2 x3y2 2 13m b 3m bn9 8 n n a a 8a a1 a1 a1 2 26c2d2 6c2

10、d2 3m m 3m8 (3m8)2 n 2 a2n2 an m2m1 m9 x6y 5xxy xy 1 52x b 2x ba6 1 a a 7n n 4n n6 n6 n6 4 38c2d 2c2d 7b 7b 2b7 (2b7)2 a 1 a2b2 ab x2x9 x1 x2y 2yx3y x3y 1 5 x a x am9 8 m m x x 2x x3 x3 x3 2 28c2d 7c2d2 2n n 3n7 (3n7)2 x 5 x2b2 xb a2a4 a37x7y 8xx3y3 x3y3 2 5 y2q y2qa1 4 a a y y y y7 y7 y7 1 26c2d2 2

11、c2d2 2y y 4y8 (4y8)2 x 2 x2b2 xb aa6 a4 x6y 3xxy xy 5 3 y n y nx7 6 x x 7y y y y7 y7 y7 3 45cd2 3c2d2 b 2b 5b5 (5b5)2 m 4 m2b2 mb x2x1 x7 x y 7xx3y3 x3y3 4 5 p3a p3ax4 4 x x 2y 6y y y7 y7 y7 4 25c2d2 7cd2 3m 4m 5m2 (5m2)2 m 6 m2n2 mn a2a4 a55x y 8yx3y x3y 5 1 x3n x3nx3 4 x x b b 2b b1 b1 b1 3 46c2d

12、3c2d2 2m m 3m4 (3m4)2 m 5 m2b2 mb mm2 m97x y 3xx2y2 x2y2 4 1 p2q p2qm5 9 m m 3n n n n9 n9 n9 4 49cd2 5c2d m 5m 3m1 (3m1)2 x 3 x2n2 xn aa7 a9 x4y 6xx3y2 x3y2 5 1 p a p ab2 8 b b b 4b b b5 b5 b5 3 39cd2 7cd2 4a 5a 5a7 (5a7)2 a 1 a2n2 an mm9 m6 x5y 4yx3y x3y 1 4 p3b p3bb6 8 b b x x 5x x9 x9 x9 4 14c2d

13、4c2d2 b 9b 3b6 (3b6)2 a 3 a2y2 ay a2a4 a7 x9y 6yxy3 xy3 2 1 p2q p2qy5 7 y y 4m 6m m m6 m6 m6 4 35c2d2 3c2d2 5m 2m 3m4 (3m4)2 a 6 a2n2 an x2x7 x8 x y 9xx2y x2y 3 4 m3a m3ab8 4 b b 9y y 5y y3 y3 y3 1 46cd 2cd2 n 5n 3n8 (3n8)2 a 3 a2y2 ay mm1 m27x y 7xx3y3 x3y3 1 43x q 3x qy4 5 y y 5y y 7y y6 y6 y6 1 29cd 3cd 7x x 2x1 (2x1)2 x 5 x2b2 xb aa8 a44x y 5xx3y2 x3y2 4 53m2b 3m2ba1 3 a a 7n n n n9 n9 n9 1 34c2d2 8cd 3b 7b 2b3 (2b3)2 n 6 a2n2 an xx6 x4