Question

помогите из решить номер 295

Answer 1

$\frac{a}{b} \times c = \frac{a \times c}{b}$
$\frac{7}{10} \times 30 = \frac{7 \times 30}{10} = 21$
$\frac{4}{15} \times 50 = \frac{4 \times 50}{15} = \frac{4 \times 5}{3} = \frac{20}{3} = 6 \times \frac{2}{3}$
$3 \times \frac{5}{12} = \frac{3 \times 5}{12} = \frac{5}{4} = 1 \times \frac{1}{4}$
$c \times \frac{a}{b} = \frac{ca}{b}$