Вариант 1. Выполните вычитание: a) \(\frac{5}{8}\) б) \(10-\frac{1}{9}\) в) \(9-\frac{5}{6}\) г) \(9-\frac{2}{4}\) д) \(7-\frac{3}{10}\) е) \(7-\frac{1}{21}\) ж) \(3 \frac{1}{15} - \frac{7}{10}\) з) \(7 \frac{5}{18} - \frac{7}{12}\) и) \(5 \frac{3}{24} - 1 \frac{1}{21}\)

Решение:

Вариант 1

1. а) \(\frac{5}{8}\)
2. б) \(10 - \frac{1}{9} = 9 \frac{9}{9} - \frac{1}{9} = 9 \frac{8}{9}\)
3. в) \(9 - \frac{5}{6} = 8 \frac{6}{6} - \frac{5}{6} = 8 \frac{1}{6}\)
4. г) \(9 - \frac{2}{4} = 9 - \frac{1}{2} = 8 \frac{2}{2} - \frac{1}{2} = 8 \frac{1}{2}\)
5. д) \(7 - \frac{3}{10} = 6 \frac{10}{10} - \frac{3}{10} = 6 \frac{7}{10}\)
6. е) \(7 - \frac{1}{21} = 6 \frac{21}{21} - \frac{1}{21} = 6 \frac{20}{21}\)
7. ж) \(3 \frac{1}{15} - \frac{7}{10} = 3 \frac{2}{30} - \frac{21}{30} = 2 \frac{32}{30} - \frac{21}{30} = 2 \frac{11}{30}\)
8. з) \(7 \frac{5}{18} - \frac{7}{12} = 7 \frac{10}{36} - \frac{21}{36} = 6 \frac{46}{36} - \frac{21}{36} = 6 \frac{25}{36}\)
9. и) \(5 \frac{3}{24} - 1 \frac{1}{21} = 5 \frac{7}{56} - 1 \frac{8}{56} = 4 \frac{63}{56} - 1 \frac{8}{56} = 4 \frac{55}{56}\)

Ответ: а) \(\frac{5}{8}\); б) \(9 \frac{8}{9}\); в) \(8 \frac{1}{6}\); г) \(8 \frac{1}{2}\); д) \(6 \frac{7}{10}\); е) \(6 \frac{20}{21}\); ж) \(2 \frac{11}{30}\); з) \(6 \frac{25}{36}\); и) \(4 \frac{55}{56}\).