1521分式的乘除同步練習(xí)

1、“分式的乘除法”復(fù)習(xí)題.填空題1.約分:m22m12m.3n1b2ma2aa,3n2b（n為正整數(shù)）2.計(jì)算:(2c)4ab2)22c2m2b2)aabi.2.3.4.5.1.2.(x)2y(N4ab3)32、xy)2y、11云）E6(2a2)(xyx2)2xyxy2xy2x判斷題下列運(yùn)算正確的打“v7”，錯(cuò)誤的打“x”2x2xy)33y3zz2zbjnb)aa2b3、38（n為正整數(shù)）（(994xy32廣y、2(3a2選擇題已知x:27a6（x爪的值是2y27114B.C.D.26213a6xy2x2yyx3x3y3x2x2y2x2，y(xy)2，2x2y則分式y(tǒng)在分式2x中，最簡分式有（）

2、A.4A.1個(gè)B.23.下列各式正確的是（C.3)D.4個(gè)四.1.2.3.4.C.ab計(jì)算8x2至)4y3/3x、3/3(ay2(ab)y6zxb3)abx2(ab)xabB.X22x1T22xxD.(尢)22c272ab(b2J)2a2X-2y2_2x6x9xx2x6x23x102(x5)2x6xa26a5a24a4a2a2b22-x65-CTV(x&()T了23xx11x26-22(xx2)a27a10a31a2a100XX如艾22oa?2b2b2X2X.2ao2abX42abb2a?22axX-2a?22axX-14.2x16124x15.x24x4(x2)72/22、4ab(ab)3(

3、ab)a2a2(ba)3(8a22b2)4a2b4ab2b3b2,其中a6a12，b12b2_225ab3ab5ab416.【試題答案】1.1;2.2424abc-.1.2.4.5.1.C2.B3.B四.1.解:原式8x23x4y36z-xy36xzy2.解:原式27x2.-y(ab)(aab(ab)b2)(ab)2(ba2)227(a229b)(aabb)x(ab)(ba2)23.解:原式(ya)(yb)(ax)(ax)(ya)(xa)4.解:原式5.解:原式6.解:原式7.解:原式8.解:原式9.解：原式(xa)(xb)(by)(by)(xb)(by)(ya)(xa)(xb)(yb)(x3

4、)2(x3)(x2)(x5)(x2)(x3)(x3)x32(x5)2(x3)1(x2)2x2x2x(x3)(x2)3x(1x)(x2x1)1x2xx21(12-x)(x2)x2x1(x(x2)(x一1)2)(a2)(a5)(a1)(a5)2(a1)(aa2(ab)2(ab)2(a2)3a(ab)31)3a(aa2b2a(ab)2b2(ax)3(ax)3(a2x2)(ax)(ax)1a2x2(ax)4(ax)410.解：原式(abc)(abc)(abc)(abc)abc(abc)(abc)(abc)(abc)abc11.解：原式(Xy)(x2)24(3x)x22(3x)(x2)72443215. 解：原式ab(ab)(ab)88(ab)b(ab)3(ab)a2a6(ba)33a216. 解：原式2(2ab)(2ab)(2ba)(b22a)bb(2ab)(b2a)(b3a)2a4b2ab12x(1)410(2)4(xy)2(xy)(xy)y(xy)y(xy)y212.解：原式空篁qM12x3y2x3y2x3y2x3yx613.解：原式x2(x2)(x2)(x2)2(x1)(x1)222(x2)2x2(x2)(x2)x21(x21)(x2)(x2)2(x1)(x1)22(