Answer :
5. 5 = 5 + 5 = 5/10 = 5 1/2
5.5 = 55/10 = 11/2 = 5 1/2
5.5 = 5 1/2 ⇔ at the same point you'll need to know that 0.5 = 1/2
5.5 = 55/10 = 11/2 = 5 1/2
5.5 = 5 1/2 ⇔ at the same point you'll need to know that 0.5 = 1/2