14. Вычисления: #173576
Найдите значение выражения: $$\Big(\frac{7}{8}-\frac{17}{12}\Big):\frac{5}{12}$$
$$\Big(\frac{7}{8}-\frac{17}{12}\Big):\frac{5}{12}=\Big(\frac{21-34}{24}\Big):\frac{5}{12}$$ $$\Big(\frac{21-34}{24}\Big):\frac{5}{12}=-\frac{13}{24}:\frac{5}{12}$$ $$-\frac{13}{24}:\frac{5}{12}=-\frac{13\cdot12}{24\cdot5}$$ $$-\frac{13\cdot{}^{1}\cancel{12}}{{}^{2}\cancel{24}\cdot5}=-1.3$$
20