문제 1선택형1724×3548=?\frac{17}{24}\times\frac{35}{48}=?2417×4835=?9801130\frac{980}{1130}11309805951152\frac{595}{1152}1152595
문제 3선택형235×147=????2\frac35\times1\frac47=????253×174=????117\frac{11}{7}711118\frac{11}{8}811