Adding Two-Digit Numbers

How to add two two-digit numbers (for example 45 + 53).

  • Place one number above the other number so that the tens' place digits and ones' place digits are lined up. Draw a line under the bottom number.
  • 45
    53
    
  • Add the two ones' place digits (5 + 3 = 8).
  • 45
    53
     8
    
  • Add the numbers in the tens' place column (4 + 5 = 9) and place the answer below the line and to the left of the ones' place sum.
  •  45
     53
     98






Find the Sum of the two Numbers

  +     =