Question

вычеслите 1/5+3/4+1/5+1/4

Answer 1

$frac{1}{5} +frac{3}{4} +frac{1}{5}+frac{1}{4}= (frac{1}{5} +frac{1}{5})+(frac{1}{4}+frac{3}{4})= frac{2}{5} +1=1frac{2}{5}$