Question

(3 2/7+4 5/21)•51/79 6 класс

Answer 1

$(3 frac{2}{7} +4 frac{5}{21} )* frac{51}{79} =(3 frac{6}{21} +4 frac{5}{21} )* frac{51}{79} =7 frac{11}{21} * frac{51}{79}= frac{158}{21} * frac{51}{79}= frac{34}{3} =11 frac{1}{3}$