Question

вычеслите 1 5/6÷(2/3-2/7)​

Answer 1

$displaystyle tt 1frac{5}{6}div(frac{2}{3}-frac{2}{7})=frac{11}{6}div(frac{14}{21}-frac{6}{21})=frac{11}{6}divfrac{8}{21}=frac{11}{6}cdotfrac{21}{8}=frac{11}{2}cdotfrac{7}{8}=frac{11cdot7}{2cdot8}=frac{77}{16}=4,8125$