Draw a number line with three notches for each number.
1 2 3 4 5
l--l--l--l--l--l--l--l--l--l--l--l--l
11/3 is equal to 3 2/3, so it would be two notches past 3, on the notch indicated with arrows below.
1 2 3 ↓ 4 5
l--l--l--l--l--l--l--l--l--l--l--l--l
↑
