分式的通分练习题(基础题)

1分式的通分练习题一．通分：1.xyyxxzy41,.3,222.432221;1;1xyyxyx3.2,36aabb4.ba223，cabba25.22225,103,54acbbaccba6.4322361,41,21xyyxzyx二．通分７.baba1,18.mnmnm23,29.121;23xxxx三．通分10.yxbyyxax,11.1,1122xxx12.21,2(1)xxxx13.21,442xxx14.221,babaa15.42,361,42222xxxxxx