Question

de cate ori se cuprinde o treime in 3 cincimi dar in 15 cincimi dar in 7 cincimi

Answer 1

de x ori
(1/3) *x= 3/5
x=(3/5):(1/3)=(3/50*3=9/5 =1.8 ori
1/3 se cuprinde in 15 cincimi adica in 3 intregi, se cuprinde de 3*3=9 ori

atunci verificam prima intrebare
deci in 3 cincimi se cuprinde de 5 ori mai putin decat in 15 cincimi ,adica de 9/5=1,8 ori

(1/3) *y=7/5
y=(7/5);(1/3) =(7/5)*3=1,4*3=4,2 ori