Question

7целых4/7минус 5целых7/9+3целых4/21

Answer 1

Пошаговое объяснение:

$7 \frac{4}{7} - 5 \frac{7}{9 } = \frac{53 \times 9}{7 \times 9} - \frac{52 \times 7}{9 \times 7} = \frac{477}{63} - \frac{364}{63} = \frac{113}{63 } = 1 \frac{50}{63} + 3 \frac{4}{21} = \frac{113}{63 } + \frac{67}{21} = \frac{113}{63} + \frac{67 \times 3}{21 \times 3} = \frac{113}{63} + \frac{201}{63} = \frac{314}{63} = 4 \frac{62}{63}$

Надеюсь помог.Удачи :)