7. Выполните вычитание. a) $$1\frac{1}{8}-\frac{6}{8} =$$ $$5\frac{2}{5}-\frac{3}{5} =$$ $$4\frac{4}{9}-\frac{5}{6} =$$ б) $$3\frac{7}{16}-1\frac{5}{8} =$$ $$6\frac{2}{15}-3\frac{2}{3} =$$ $$12\frac{5}{8}-5\frac{11}{12} =$$

a)

• $$1\frac{1}{8}-\frac{6}{8} = \frac{9}{8} - \frac{6}{8} = \frac{3}{8}$$
• $$5\frac{2}{5}-\frac{3}{5} = \frac{27}{5} - \frac{3}{5} = \frac{24}{5} = 4\frac{4}{5}$$
• $$4\frac{4}{9}-\frac{5}{6} = \frac{40}{9} - \frac{5}{6} = \frac{80}{18} - \frac{15}{18} = \frac{65}{18} = 3\frac{11}{18}$$

б)

• $$3\frac{7}{16}-1\frac{5}{8} = 3\frac{7}{16}-1\frac{10}{16} = 2\frac{23}{16}-1\frac{10}{16} = 1\frac{13}{16}$$
• $$6\frac{2}{15}-3\frac{2}{3} = 6\frac{2}{15}-3\frac{10}{15} = 5\frac{17}{15}-3\frac{10}{15} = 2\frac{7}{15}$$
• $$12\frac{5}{8}-5\frac{11}{12} = 12\frac{15}{24}-5\frac{22}{24} = 11\frac{39}{24}-5\frac{22}{24} = 6\frac{17}{24}$$