Number Bonds: Play Free Online – Math for 1st-5th grade

Sums up to 1

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Sums up to 1000

Fairly difficult

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Recent activities in this game

Someone had a problem at level 1. Sums up to 1 .

2025-12-04 03:11 after 9 seconds of playing.

Someone got all questions correct at level 4. Sums up to 4 .

2025-12-03 11:31 after 2 minutes of playing.

Someone got all questions correct at level 3. Sums up to 3 .

2025-12-03 11:29 after 1 minute of playing.

Someone got all questions correct at level 2. Sums up to 2 .

2025-12-03 11:27 after 2 minutes of playing.

Someone got all questions correct at level 1. Sums up to 1 .

2025-12-03 11:25 after 2 minutes of playing.

Someone got all questions correct at level 20. Sums up to 20 .

2025-12-01 06:20 after 1 minute of playing.

Someone got all questions correct at level 15. Sums up to 15 .

2025-12-01 06:18 after 1 minute of playing.

Someone got all questions correct at level 14. Sums up to 14 .

2025-12-01 06:17 after 1 minute of playing.

Someone got all questions correct at level 10. Sums up to 10 .

2025-12-01 06:15 after 49 seconds of playing.

Someone got all questions correct at level 12. Sums up to 12 .

2025-12-01 06:15 after 2 minutes of playing.

Are you aware of all number bonds? Practice all number bonds to learn how numbers are split or combined in addition.

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Game instructions for number bonds

What is a number bond? It's a fun way of showing how numbers are split and combined in addition. What other number, in addition to the given number, adds up to the whole? Each level gives you up to 10 number bond problems for your chosen target sum. Number bonds are also called complementary numbers.

The number bonds are different each time you attempt a certain level. You must enter the correct number bond in order to proceed in the game. If you enter the wrong number, then it will be marked with a red border around the number. If it's too difficult, you can always change level by clicking the button Cancel. When you practice number bonds in this educational game, your mental math skills improve, making calculation easier.

Calculation of knowledge points

Each completed game level in Number Bonds gives 1 knowledge points. You can collect a maximum of 25 knowledge points by completing all 25 levels.

In the game Number Bonds, you can earn a total of 75 medals. Medals are awarded based on how many times you have completed a level:

Bronze medal: after completing 2 rounds.
Silver medal: after completing 5 rounds.
Gold medal: after completing 10 rounds.

Knowledge points are only awarded for levels you have not completed before, meaning those that do not yet have checked green circles. Even after completing a level and earning both knowledge points and medals, you can continue practicing it. However, this will not grant any additional knowledge points or medals.