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Adding 2-Digit Numbers: Learn

How to add two-digit numbers (for example 42 + 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.
    4 2
    + 5 3
  • Add the two ones' place digits. (2 + 3 = 5). Place the five below the line in the ones' place column.
    4 2
    + 5 3
    5
  • 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.
    4 2
    + 5 3
    9 5

Adding Two-Digit Numbers: Practice

What is the Sum of the two Numbers?

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