b)
3 4/5 = (3x5 + 4)/5 = 19/5
3 4/5 = 12/15 (F)
c)
1/2 x 2/3 x 3/4 = 1/4 (A)
Simplificam 2 cu 2 si 3 cu 3
d)
2/3 x 1/3 x 4 = 8/9
2/3 x 1/3 x 4 = 4 (F)
e)
(1/3 + 1/6) x 2 = (2 + 1)/6 x 2 = 3/6 x 2 = 6/6 = 1
(1/3 + 1/6) x 2 = 1
f)
2/3 x 3/2 = 1 (A)
Simplificam 2 cu 2 si 3 cu 3