1) $\frac{1}{4} + \frac{1}{12} = ?$ 2) $\frac{1}{6} + \frac{2}{3} = ?$ 3) $\frac{7}{8} + \frac{3}{4} = ?$ 4) $\frac{4}{7} + \frac{2}{21} = ?$ 5) $\frac{9}{12} + \frac{3}{4} = ?$ 6) $\frac{8}{9} + \frac{1}{3} = ?$ 7) $\frac{4}{5} + \frac{7}{15} = ?$ 8) $\frac{2}{21} + \frac{5}{14} = ?$ 9) $\frac{3}{18} + \frac{5}{27} = ?$ 10) $\frac{3}{15} + \frac{7}{20} = ?$

Question

Вопрос: $Фото задания: 1) $\frac{1}{4} + \frac{1}{12} = ?$ 2) $\frac{1}{6} + \frac{2}{3} = ?$ 3) $\frac{7}{8} + \frac{3}{4} = ?$ 4)…$ Фото задания

1) $\frac{1}{4} + \frac{1}{12} = ?$ 2) $\frac{1}{6} + \frac{2}{3} = ?$ 3) $\frac{7}{8} + \frac{3}{4} = ?$ 4) $\frac{4}{7} + \frac{2}{21} = ?$ 5) $\frac{9}{12} + \frac{3}{4} = ?$ 6) $\frac{8}{9} + \frac{1}{3} = ?$ 7) $\frac{4}{5} + \frac{7}{15} = ?$ 8) $\frac{2}{21} + \frac{5}{14} = ?$ 9) $\frac{3}{18} + \frac{5}{27} = ?$ 10) $\frac{3}{15} + \frac{7}{20} = ?$

Accepted Answer

Решение:

$\frac{1}{4} + \frac{1}{12} = \frac{3}{12} + \frac{1}{12} = \frac{4}{12} = \frac{1}{3}$
$\frac{1}{6} + \frac{2}{3} = \frac{1}{6} + \frac{4}{6} = \frac{5}{6}$
$\frac{7}{8} + \frac{3}{4} = \frac{7}{8} + \frac{6}{8} = \frac{13}{8}$
$\frac{4}{7} + \frac{2}{21} = \frac{12}{21} + \frac{2}{21} = \frac{14}{21} = \frac{2}{3}$
$\frac{9}{12} + \frac{3}{4} = \frac{3}{4} + \frac{3}{4} = \frac{6}{4} = \frac{3}{2}$
$\frac{8}{9} + \frac{1}{3} = \frac{8}{9} + \frac{3}{9} = \frac{11}{9}$
$\frac{4}{5} + \frac{7}{15} = \frac{12}{15} + \frac{7}{15} = \frac{19}{15}$
$\frac{2}{21} + \frac{5}{14} = \frac{4}{42} + \frac{15}{42} = \frac{19}{42}$
$\frac{3}{18} + \frac{5}{27} = \frac{1}{6} + \frac{5}{27} = \frac{9}{54} + \frac{10}{54} = \frac{19}{54}$
$\frac{3}{15} + \frac{7}{20} = \frac{1}{5} + \frac{7}{20} = \frac{4}{20} + \frac{7}{20} = \frac{11}{20}$

Ответ: 1) $\frac{1}{3}$ 2) $\frac{5}{6}$ 3) $\frac{13}{8}$ 4) $\frac{2}{3}$ 5) $\frac{3}{2}$ 6) $\frac{11}{9}$ 7) $\frac{19}{15}$ 8) $\frac{19}{42}$ 9) $\frac{19}{54}$ 10) $\frac{11}{20}$