25又10/39*3/5-43又1/13/7
问题描述:
25又10/39*3/5-43又1/13/7
答
25又10/39*3/5-43又1/13/7
=(25+10/39)*(3/5)-(42+14/13)/7
=15+(2/13) -6-(2/13)
=9