Adding Hundreds

How to add three-digit numbers (for example 600 + 500).

  • Place one number above the other so the hundreds' place digits, the tens' place digits and ones' place digits are lined up. Draw a line under the bottom number.
  • 600
    500
    
  • Add the two ones' place digits. (0 + 0 = 0).
  • 
    600
    500
      0
    
  • Add the numbers in the tens' place column (0 + 0 = 0) and place the answer below the line and to the left of the ones' place sum.
  •  600
     500
      00
  • Add the numbers in the hundreds' place column (6 + 5 = 11) and place the answer below the line and to the left of the tens' place sum.
  •   600
      500
     1100

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Find the Sum of the Numbers.

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Copyright (C) 2009 J. Banfill. All Rights Reserved.