1. Вычисли: 1) $\frac{5}{12}\cdot6$; 2) $\frac{2}{15}\cdot\frac{9}{10}$; 3) $\left(\frac{4}{7}\right)^2$; 4) $\left(\frac{7}{16}\cdot\frac{4}{21}\right)\cdot\frac{9}{11}$; 5) $\frac{7}{19}\cdot0$; 6) $1\cdot\frac{16}{21}$.

Question

$Фото задания: 1. Вычисли: 1) $\frac{5}{12}\cdot6$; 2) $\frac{2}{15}\cdot\frac{9}{10}$; 3) $\left(\frac{4}{7}\right)^2$; 4)…$ Фото задания

Accepted Answer

$\frac{5}{12}\cdot6=\frac{5}{12}\cdot\frac{6}{1}=\frac{30}{12}=\frac{5}{2}=2\frac{1}{2}$.
$\frac{2}{15}\cdot\frac{9}{10}=\frac{18}{150}=\frac{3}{25}$.
$\left(\frac{4}{7}\right)^2=\frac{4^2}{7^2}=\frac{16}{49}$.
$\left(\frac{7}{16}\cdot\frac{4}{21}\right)\cdot\frac{9}{11}=\frac{1}{12}\cdot\frac{9}{11}=\frac{9}{132}=\frac{3}{44}$.
$\frac{7}{19}\cdot0=0$.
$1\cdot\frac{16}{21}=\frac{16}{21}$.

Ответ: 1) $2\frac{1}{2}$; 2) $\frac{3}{25}$; 3) $\frac{16}{49}$; 4) $\frac{3}{44}$; 5) $0$; 6) $\frac{16}{21}$.

1. Вычисли: 1) \(\frac{5}{12}\cdot6\); 2) \(\frac{2}{15}\cdot\frac{9}{10}\); 3) \(\left(\frac{4}{7}\right)^2\); 4) \(\left(\frac{7}{16}\cdot\frac{4}{21}\right)\cdot\frac{9}{11}\); 5) \(\frac{7}{19}\cdot0\); 6) \(1\cdot\frac{16}{21}\).