Question

(5-20/35 x 1 2/5) x 2/21

Answer 1

Ответ:

2/5

Пошаговое объяснение:

1) 20/35 * 1 2/5 = 4/7 * 7/5 = 4/5

2) 5 - 4/5 = 4 1/5

3) 4 1/5 * 2/21 = 21/5 * 2/21 = 2/5

Answer 2

$(5 - \frac{20}{35} \times 1 \frac{2}{5} ) \times \frac{2}{21} = \frac{2}{5}$

Решение:

$1) \frac{20}{35} \times 1 \frac{2}{5} = \frac{4}{7} \times \frac{7}{5} = \frac{4}{5}$

$2)5 - \frac{4}{5} = 4 \frac{1}{5}$

$3)4 \frac{1}{5} \times \frac{2}{21} = \frac{21}{5} \times \frac{2}{21} = \frac{2}{5}$