Question

Решите плз не а б с а решить надо плиз

Answer 1

 

$frac{2frac{5}{8}-2frac{5}{14}cdotfrac{2}{3}}{(3frac{1}{12}+4,375):19frac{8}{9}}=2frac{17}{21} \ 1) 2frac{5}{8}-2frac{5}{14}cdotfrac{2}{3}=frac{5}{8}-frac{33}{14}cdotfrac{2}{3}=2frac{5}{8}-frac{11}{7}=2frac{5}{8}-1frac{4}{7}=1+frac{35-32}{56}= \ =1frac{3}{56},$

 

$2) 3frac{1}{12}+4,375=3frac{1}{12}+4frac{3}{8}=7+frac{2+9}{24}=7frac{11}{24}, \ 3) 7frac{11}{24}:19frac{8}{9}=frac{179}{24}:frac{179}{9}=frac{179}{24}:frac{179}{9}=frac{179}{24}cdotfrac{9}{179}=frac{3}{8}, \ 4) frac{1frac{3}{56}}{frac{3}{8}}=frac{59cdot8}{56cdot3}=frac{59}{21}=2frac{17}{21}.$