初二上《分式的约分和通分练习》.docx
初二上分式的约分和通分练习分式的约分和通分练习 约分: abc38abc(x+y)(a-b)24a2b2c3 (x+y)2(a-b) ab 3242-4abc-32a3b2c24a2b3d 16abc4 23x+4x+3 +x-6x22x2-7x249-x2212a(y-x) 27a(x-y)32 21-x2x-3x+22xy+xy2xya-x x-a2m-2m+1 1-ma-ab+b33a+b22 1-xx-3x-1832 x-x+x+1 x-94通分: 3x-2x+11-x,2,221-xx-3x+22x-x+3 1111,2xx+1x-1x-1123,2 (a+b)-a+ba2-b21241,x-22 m-99-3m x-2 11b1,22 a-b,x-1x-3x+2a-ba-b22111 a2-2a+1,a2-1,a2+2a+1