Răspuns :
b 40: 4 = 10, c 10*2= 20, a:b*c= 40:10*20= 80. c:b* a= 20:10*40= 80
a =》 40
b =》 40 : 4 = 10
c =》 10 × 2 = 20
a : b × c = 40 : 10 × 20 = 4 × 20 = 80
c : b × a = 20 : 10 × 40 = 2 × 40 = 80
b =》 40 : 4 = 10
c =》 10 × 2 = 20
a : b × c = 40 : 10 × 20 = 4 × 20 = 80
c : b × a = 20 : 10 × 40 = 2 × 40 = 80