Adding 3-Digit Numbers: Learn

• Place one number above the other so that the hundreds, tens and ones places are lined up. Draw a line under the bottom number.

  	5	2	9
  +	7	3	3

• Add the ones place digits (9 + 3 = 12). This number is larger than 10 so place a one above the tens place column and place the two below the line in the ones place column.

  		1
  	5	2	9
  +	7	3	3
  			2

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

  		1
  	5	2	9
  +	7	3	3
  		6	2

• Add the numbers in the hundreds place column (5 + 7 = 12) and place the 2 below the line and before the other number below the line. Place the 1 from the twelve above the thousands place column.

  1
  	5	2	9
  +	7	3	3
  	2	6	2

• The thousands place column only has a 1 in it which should be placed below the line in the thousands place column.

  1
  	5	2	9
  +	7	3	3
  1	2	6	2