5 - 1 1/3 X 1 1/4 X 27 31 - Все ответы

Решите задачу:

$5 - 1 \frac{1}{3} \times 1 \frac{1}{4} \times \frac{27}{31} =3 \frac{17}{31} \\ \\ 1)1 \frac{1}{3} \times 1 \frac{1}{4} = \frac{4}{3} \times \frac{5}{4} = \frac{5}{3} \\ \\ 2) \frac{5}{3} \times \frac{27}{31} = \frac{5 \times 27}{3 \times 31} = \frac{45}{31} = 1 \frac{14}{31} \\ \\ 3)5 - 1 \frac{14}{31} = 4 \frac{31}{31} - 1 \frac{14}{31} = 3 \frac{17}{31}$