Выполните сложение:
а) $\frac{3}{8} + 2\frac{1}{4}$;
б) $\frac{1}{4} + 3\frac{1}{6}$;
в) $5\frac{2}{15} + 3\frac{2}{9}$;
г) $2\frac{4}{9} + \frac{1}{6}$;
д) $1\frac{3}{5} + 10\frac{1}{4}$;
е) $4\frac{1}{4} + \frac{2}{9}$.
$\frac{3}{8} + 2\frac{1}{4} = 2 + (\frac{3}{8} + \frac{1}{4}) = 2 + \frac{3 + 2}{8} = 2 + \frac{5}{8} = 2\frac{5}{8}$
$\frac{1}{4} + 3\frac{1}{6} = 3 + (\frac{1}{4} + \frac{1}{6}) = 3 + \frac{3 + 2}{12} = 3 + \frac{5}{12} = 3\frac{5}{12}$
$5\frac{2}{15} + 3\frac{2}{9} = (5 + 3) + (\frac{2}{15} + \frac{2}{9}) = 8 + \frac{6 + 10}{45} = 8 + \frac{16}{45} = 8\frac{16}{45}$
$2\frac{4}{9} + \frac{1}{6} = 2 + (\frac{4}{9} + \frac{1}{6}) = 2 + \frac{8 + 3}{18} = 2 + \frac{11}{18} = 2\frac{11}{18}$
$1\frac{3}{5} + 10\frac{1}{4} = (1 + 10) + (\frac{3}{5} + \frac{1}{4}) = 11 + \frac{12 + 5}{20} = 11 + \frac{17}{20} = 11\frac{17}{20}$
$4\frac{1}{4} + \frac{2}{9} = 4 + (\frac{1}{4} + \frac{2}{9}) = 4 + \frac{9 + 8}{36} = 4 + \frac{17}{36} = 4\frac{17}{36}$
Пожауйста, оцените решение