Question

Помогите
7980 (3/16+39/80)

Answer 1

$frac{79}{80}* (frac{3}{16} - frac{39}{80} )=frac{237}{800} ; \ 1) frac{3}{16} - frac{39}{80}=frac{3*5}{80} - frac{39}{80}= -frac{24}{80}=- frac{3}{10} ; \ 2) frac{79}{80}* frac{3}{10}= frac{237}{800}$