220. Выполните вычитание: a) 4 14/19-2 5/19; в) 12-7/18; д) 8 7/15-3 11/15; б) 8 7/10-5; г) 11-3 5/12; c) 10 9/14-3 9/14

а) $$4\frac{14}{19} - 2\frac{5}{19} = (4-2) + (\frac{14}{19} - \frac{5}{19}) = 2 + \frac{14-5}{19} = 2 + \frac{9}{19} = 2\frac{9}{19}$$

Ответ: $$2\frac{9}{19}$$

б) $$8\frac{7}{10} - 5 = 3\frac{7}{10}$$

Ответ: $$3\frac{7}{10}$$

в) $$12 - \frac{7}{18} = 11\frac{18}{18} - \frac{7}{18} = 11\frac{18-7}{18} = 11\frac{11}{18}$$

Ответ: $$11\frac{11}{18}$$

г) $$11 - 3\frac{5}{12} = 10\frac{12}{12} - 3\frac{5}{12} = (10-3) + (\frac{12}{12} - \frac{5}{12}) = 7 + \frac{12-5}{12} = 7 + \frac{7}{12} = 7\frac{7}{12}$$

Ответ: $$7\frac{7}{12}$$

д) $$8\frac{7}{15} - 3\frac{11}{15} = 8 + \frac{7}{15} - 3 - \frac{11}{15} = (8-3) + (\frac{7}{15} - \frac{11}{15}) = 5 - \frac{4}{15} = 4\frac{15}{15} - \frac{4}{15} = 4\frac{11}{15}$$

Ответ: $$4\frac{11}{15}$$

e) $$10\frac{9}{14} - 3\frac{9}{14} = (10-3) + (\frac{9}{14} - \frac{9}{14}) = 7 + 0 = 7$$

Ответ: $$7$$