分式加减法专项练习60题有答案3.a-b-a+b-2+a+1a-l5.6.1_3z- 3 x (k- 3)8.丄丄a+1 a+L6yue2810.11.x2 - 2yx 2+x 2x2-4X +4i+412.13.m - 52ro2- 22a 丄114.；1 - a1+a15.16.12 2m2 9ID 7117.1 _3-2/-4n m2 2 m - nm 2h- 4nn+4 n18. ab+ b 匚b3ab+b220.1. 1 _ 2na3-b3b2-2ab+b2+2 -i 2ba - 1 XI a2 - 119.4x.22.2syy12-lx2-y221.m+2m+l . 2m十 22a _ ab_ ac+bc b _ ab _ bc+ac c _ ac _ hc+ab - 1m - 123.24.亠亠26.n _ m m_ n n _ it25.2y+zy2 , 2+xy,727.28.29.式中a, b, c两两不相等2a _ b 一亡2b -_2e _ b毁 2x- 57x-1030.+_ ,仕-6x2- x- 12 X2 -6x+831. 1-“；xty + 1 -X (xfl)(计1)(計刃(x+2005)(x+2006)b12a+cb-u a- br+c+b mb- a- c33.化简分式:2注+3寸2 _ 盘2_3_ 5 _ 3仪，一 4 且一 52a* 一 呂 a+5a+l旦+2a- 2a_ 334.y2 _ / _ 2 亦,72?2X y+xyX y xy y宀卩22x+2yT7/35 .计算:36.计算:玄+2y厂37计算:38.39.计算化简：41.计算厂1：，:-)10.+b =已a+b a+bba+ba+b11.12.m 2nrF21(时2) (m - 2)(计 2)(n)-2)ID _ 2(x-1)(汁 2)x-11（我）2=k+2x+2x+214.1： .-J+a-1.a2+aa- 1- 2a+l(a 1 ) 2原式=a (a+1)I 1 (a-1) G+l)=-19.p912? (#b)(-匕)1_b=.1 -b(a-b) 2b (a+b)a-b Gb) -b(a_ b) ( a+ab+ b?)1, 1_ 注ar+l+a 1 2a= 0a_1屏1 屏-i(a- 1)(a+1)(aMCa-1)原式=20.(ntH) 2_2iiri-L _2mH - 2m - 1(m- 1)(nr+1)m _ 1m - 1 m 1m _ 1m - 123.原式12 ._ 2 2 112- 2 (m+3)2 Cm - 3?啦2 _1 3 - m d+3(ni-3) (id - 35 亠(ird-3) (in - 3) + (red-3) Cm _ 3)12- 2 缶3)吃(m-3)12 2ro- 6+2m - $u l 一. (irH-3) Cm - 3)26.27.原式28.Sab2卅 x2 y 3a+ 3b(a+3b)3ab=2忑广2t+k y 2s：厂孑6b 2=(監十y ts - y)s+y29.(a- b)斗(耳-右)(b c) + (b -(c a) + - b)=(泣-b)(a_ c)十br)(b-&)+ Qp) (cb)3ab3ab a原式31. 12xx+y2 1+ 1 +.+ 1 =1 -1+ 1X (心&+1)(x42)Qx+2005)(计2006)同x+1y+1=1 1 =200& nx xf2006 kCx+2006).32.+ +r+2005Lx-l-2006b , 2a-c_ b - cb2a+c - b-+c- b2a - b42c 2a - 2b+2ca 一 b+匸 b _ a _ c b _ a _ c+ + a- b+c b _ a- a b _ a _ c b _ a- c b a=-22a2+3a+2 a2-a- 5 Sa2 - 4a- 5 2a2 8a+5afla+2a 2a-333.=2a+1 +a- 3古-3a+2+二厂2a-211(a- 2) Ca- 3)一=2a+1- a- 3- 3a+2+2a- 2 +34.(x-y) 2x