Question

(5[1] [6]-3,25)*[4] [23]

Answer 1

$(5frac{1}{6}-3,25)cdot frac{4}{23}=(5frac{1}{6}-3frac{1}{4})cdot frac{4}{23}=(frac{31}{6}-frac{13}{4})cdot frac{4}{23}=frac{31cdot 2-13cdot 3}{12}cdot frac{4}{23}=\\=frac{23}{12}cdot frac{4}{23}=frac{1}{3}$

или  $5frac{1}{6}-3frac{1}{4}=(5-3)+(frac{1}{6}-frac{1}{4})=2+frac{2-3}{12}=2-frac{1}{12}=frac{24-1}{12}=frac{23}{12}=1frac{11}{12}$