How to Play Sum Ten Challenge

Sum Ten Challenge is a quick thinking addition game. Add numbers in a row to make exactly ten.

What is Sum Ten Challenge?

Click a plus sign to add the numbers in that row, column or diagonal. Making exactly ten earns points. A total under ten increases one of the numbers and adds a new number. Going over ten ends the game. Your score shows at the top left and your best score of the session at the top right.

How to play Sum Ten Challenge

Click or tap the plus signs.

Step by step

1. Look at the numbers in each row, column and diagonal.
2. Add them in your head.
3. Click the plus sign for a line that makes 10.
4. If none makes 10, choose a line that stays under 10.
5. Never choose a line that adds up to more than 10.

Strategy tips to play better

• Learn the pairs that make 10: 1+9, 2+8, 3+7, 4+6, 5+5.
• Check every line before clicking, including diagonals.
• If no line makes 10, pick the line with the smallest total to stay safe.
• Think ahead: a line under 10 now may make 10 after the numbers change.

What kids learn

• Addition within 10
• Number bonds to 10
• Mental math
• Strategy

For parents and teachers

A great game for kindergarten and grade 1 to learn pairs that make 10.