Запишите смешанную дробь в виде неправильной дроби:
а) $1\frac{1}{2}, 2\frac{1}{3}, 3\frac{2}{5}, 2\frac{3}{4}, 4\frac{2}{3}, 1\frac{2}{7}$;
б) $2\frac{1}{2}, 1\frac{3}{5}, 6\frac{1}{6}, 3\frac{4}{9}, 7\frac{3}{11}, 5\frac{5}{12}$.
$1\frac{1}{2} = \frac{1 * 2 + 1}{2} = \frac{2 + 1}{2} = \frac{3}{2}$
$2\frac{1}{3} = \frac{2 * 3 + 1}{3} = \frac{6 + 1}{3} = \frac{7}{3}$
$3\frac{2}{5} = \frac{3 * 5 + 2}{5} = \frac{15 + 2}{5} = \frac{17}{5}$
$2\frac{3}{4} = \frac{2 * 4 + 3}{4} = \frac{8 + 3}{4} = \frac{11}{4}$
$4\frac{2}{3} = \frac{4 * 3 + 2}{3} = \frac{12 + 2}{3} = \frac{14}{3}$
$1\frac{2}{7} = \frac{1 * 7 + 2}{7} = \frac{7 + 2}{7} = \frac{9}{7}$
$2\frac{1}{2} = \frac{2 * 2 + 1}{2} = \frac{4 + 1}{2} = \frac{5}{2}$
$1\frac{3}{5} = \frac{1 * 5 + 3}{5} = \frac{5 + 3}{5} = \frac{8}{5}$
$6\frac{1}{6} = \frac{6 * 6 + 1}{6} = \frac{36 + 1}{6} = \frac{37}{6}$
$3\frac{4}{9} = \frac{3 * 9 + 4}{9} = \frac{27 + 4}{9} = \frac{31}{9}$
$7\frac{3}{11} = \frac{7 * 11 + 3}{11} = \frac{77 + 3}{11} = \frac{80}{11}$
$5\frac{5}{12} = \frac{5 * 12 + 5}{12} = \frac{60 + 5}{12} = \frac{65}{12}$