5.2分式的乘除法一.填空题1.计算:224)2()2(cabc;4222)1()()(ababba;)()()(2222xyxyyx;112112)2()2(yxxy;62332)2()43(abcabc;222222)(xyxxyyxyxxxy。二.判断题下列运算正确的打“√”,错误的打“×”:1.yxxyxxyyxyxyyxx2122()2.33632)(zyxzyx()3.249223)(zyxzyx()4.nnnabab2422)((n为正整数)()5.69323278)32(abab()三.选择题1.下列各式正确的是()A.yxyxyxyx2222B.222)11(1212xxxxxxC.bbaba2D.2222)(bacbac四.计算1.)6()43(8232yxzyxx2.223332)()()3(ababbabax3.222222)()(ybxaabxbaxabybay4.)5(2310396962222xxxxxxxxx5.xxxxxxx36)3(4462226.)]2(11[1122322xxxxxxx7.214415610722322aaaaaaaaaa8.3222)()(baaabba9.2224422222322)(1)2()(xaxaxaxaxaxaxa10.abcbabccbaaccbaabcba222222222222222211.])([)(2222yxyxyyxyyx12.yxyxxyxy2131231323213.112244442222232223xxxxxxxxxxxx14.)2(44124416222xxxxxx15.32242227]2)([)(])(3[abaabababa16.2222322226535244)28(aabbbaabbbabbaba,其中21a,41b。