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 Home--maths--Third Grade--Adding Three Digit Numbers

Adding Three Digit Numbers

Adding Three Digit Numbers

Adding two three digit numbers (for example 529 + 733) involves several steps.

  • Place one number above the other so that the hundreds, tens and ones places are lined up. Draw a line under the bottom number.
    
    529
    733
    
    
  • 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
    529
    733
      2
    
  • Add the tens place digits (1 + 2 + 3 = 6) and place the answer below the line and in the tens place column.
    
    529
    733
     62
  • 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
     529
     733
     262
  • The thousands place column only has a 1 in it which should be placed below the line in the thousands place column.
    
      529
      733
     1262

Find the Sum of the two Numbers.

  +     =     




2006-10-17 16:07:35
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