Вариант 6. Выполните вычитание: а) \(7 - 4 \frac{5}{9}\) б) \(6 \frac{13}{21} + 2 \frac{9}{14}\) в) \(5 \frac{1}{6} - 3 \frac{3}{4}\) г) \(4 \frac{3}{10} + 1 \frac{5}{12}\)

Решение:

1. \(7 - 4 \frac{5}{9} = 6 \frac{9}{9} - 4 \frac{5}{9} = 2 \frac{4}{9}\)


2. \(6 \frac{13}{21} + 2 \frac{9}{14} = 6 \frac{26}{42} + 2 \frac{27}{42} = 8 \frac{53}{42} = 9 \frac{11}{42}\)


3. \(5 \frac{1}{6} - 3 \frac{3}{4} = 5 \frac{2}{12} - 3 \frac{9}{12} = 4 \frac{14}{12} - 3 \frac{9}{12} = 1 \frac{5}{12}\)


4. \(4 \frac{3}{10} + 1 \frac{5}{12} = 4 \frac{18}{60} + 1 \frac{25}{60} = 5 \frac{43}{60}\)

Ответ: а) \(2 \frac{4}{9}\); б) \(9 \frac{11}{42}\); в) \(1 \frac{5}{12}\); г) \(5 \frac{43}{60}\).