Răspuns:
Explicație pas cu pas:
a)
0,5*4/5 = 5/10*4/5 = 1/2*4/5 = 2/5
______________
b)
11/5*0,75 = 11/5*75/100 = 11/5*3/4 = 33/20
c)
1,25*4*2/5 = 125/100*8/5 = 5/4*8/5 = 2
