Question

"(2 целых 3/4 +2 целых 1/5) x 16"

Answer 1

1 способ 
$(2 frac{3}{4}+2 frac{1}{5} )*16=(2 frac{15}{20}+2 frac{4}{20} )*16= \ \ =(4 frac{19}{20} )*16= frac{99}{20} *16= frac{99*4}{5} = \ \ = frac{396}{5}= 79 frac{1}{5}$

2 способ
$(2 frac{3}{4}+2 frac{1}{5} )*16=(2,75+2,2)*16= \ \ =4,95*16=79,2$