Addition Chart

Master addition facts with this interactive chart. Addition is the foundation of all math - build strong skills here before moving to multiplication!

+0123456789101112
00123456789101112
112345678910111213
2234567891011121314
33456789101112131415
445678910111213141516
5567891011121314151617
66789101112131415161718
778910111213141516171819
8891011121314151617181920
99101112131415161718192021
1010111213141516171819202122
1111121314151617181920212223
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View Multiplication Chart

How to Use the Addition Chart

The addition chart shows the sum of any two numbers from 0 to 12:

  1. Find the first number in the leftmost column
  2. Find the second number in the top row
  3. Where the row and column meet is your answer (the sum)

Example: 7 + 5 = ?
Find 7 in the left column, 5 in the top row. Where they meet shows 12.
So 7 + 5 = 12

Addition Facts to Know

  • •Adding 0: Any number plus 0 equals itself (5 + 0 = 5)
  • •Adding 1: Just count up one number (7 + 1 = 8)
  • •Doubles: Adding a number to itself (4 + 4 = 8)
  • •Making 10: Learn pairs that make 10 (3+7, 4+6, 5+5)
  • •Order doesn't matter: 3 + 5 = 5 + 3 (commutative property)

Patterns in the Addition Chart

Diagonal Lines

Notice that all cells on a diagonal line have the same value. This is because when you move down one row and left one column, you add 1 and subtract 1, keeping the sum the same.

Symmetry

The chart is symmetric along its diagonal. This reflects the commutative property: 3 + 5 = 5 + 3, so these appear in mirror positions.

Next Steps

Once you've mastered addition, you're ready for multiplication!

Multiplication ChartDivision Chart