Выполните сложение:
а) $\frac{3}{8} + 2\frac{1}{4}$;
б) $\frac{1}{4} + 3\frac{1}{6}$;
в) $5\frac{5}{12} + 3\frac{2}{9}$;
г) $2\frac{4}{9} + \frac{1}{6}$;
д) $4\frac{3}{5} + 10\frac{1}{4}$.
$\frac{3}{8} + 2\frac{1}{4} = \frac{3}{8} + 2\frac{2}{8} = \frac{3}{8} + 2 + \frac{2}{8} = 2 + \frac{5}{8} = 2\frac{5}{8}$
$\frac{1}{4} + 3\frac{1}{6} = \frac{3}{12} + 3\frac{2}{12} = \frac{3}{12} + 3 + \frac{2}{12} = 3 + \frac{5}{12} = 3\frac{5}{12}$
$5\frac{5}{12} + 3\frac{2}{9} = 5\frac{15}{36} + 3\frac{8}{36} = 5 + \frac{15}{36} + 3 + \frac{8}{36} = 8 + \frac{23}{36} = 8\frac{23}{36}$
$2\frac{4}{9} + \frac{1}{6} = 2\frac{8}{18} + \frac{3}{18} = 2 + \frac{8}{18} + \frac{3}{18} = 2 + \frac{11}{18} = 2\frac{11}{18}$
$4\frac{3}{5} + 10\frac{1}{4} = 4\frac{12}{20} + 10\frac{5}{20} = 4 + \frac{12}{20} + 10 + \frac{5}{20} = 14 + \frac{17}{20} = 14\frac{17}{20}$