Question

Найдите значение выражения 15*(3/20 + 7/30)

Answer 1

Ответ:

15*(3/20+7/30) = 15 * 23 /60 = 23 /4 = 5,75

Answer 2

$15 \times ( \frac{3}{20} + \frac{7}{30} ) = \\ 15 \times ( \frac{9}{60} + \frac{14}{60} ) = \\ 15 \times \frac{23}{60} = \frac{23}{4} = 5 \frac{3}{4}$