Adding three numbers (for example 45 + 82 + 67) with paper and pencil involves several steps.
- Place the numbers above each other so the tens place digits and ones place digits
are lined up. Draw a line under the bottom number.
45
82
67
- Add the three ones place digits. (5 + 2 + 7 = 14). This sum is larger
than 10 so place a one above the tens place column and place the four below the
line in the ones place column.
1
45
82
67
4
- Add the numbers in the tens place column (1 + 4 + 8 + 6 = 19) and place the answer below
the line and to the left of the ones place sum
1
45
82
67
194
- If the sum of the ones place digits is less than ten no number is placed above the
tens place column