How to add two two-digit numbers (for example 29 + 33).

• If the numbers are arranged vertically, they are in a format ready to be added.

29
33

• Add the ones' place digits (9 + 3 = 12). This sum is a two-digit number, so place a one above the tens' place column and place the two below the line in the ones' place column.

1
29
33
 2

• Add the tens' place digits (1 + 2 + 3 = 6) and place the answer below the line in the tens' place column.

29
33
62