Question

алгебра 7 класс задания 5
$(5 frac{8}{9} div 1 frac{17}{36} + 1 frac{1}{4} ) times frac{5}{21 }$

Answer 1

(53/9:53/36+ 5/4)*5/21= (53/9*36/53+5/4)*5/21= (4+5/4)*5/21= 21/4*5/21= 5/4= 1 1/4 ( или 1,25)