# Number bonds

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## Recent activities in this game

Someone had a problem at level

*15. Sums up to 15*.8 hours ago after 57 seconds of playing.

Someone got

**all questions correct**at level*15. Sums up to 15*.8 hours ago after 50 seconds of playing.

Someone got

**all questions correct**at level*15. Sums up to 15*.8 hours ago after 43 seconds of playing.

Someone had a problem at level

*15. Sums up to 15*.8 hours ago after 49 seconds of playing.

Someone had a problem at level

*10. Sums up to 10*.11 hours ago after 6 seconds of playing.

Someone had a problem at level

*1. Sums up to 1*.16 hours ago after 21 seconds of playing.

Someone got

**all questions correct**at level*19. Sums up to 19*.2019-01-17 18:41 after 2 minutes of playing.

Someone got

**all questions correct**at level*19. Sums up to 19*.2019-01-17 18:39 after 3 minutes of playing.

Someone had a problem at level

*10. Sums up to 10*.2019-01-17 16:18 after 6 seconds of playing.

Someone had a problem at level

*2. Sums up to 2*.2019-01-17 10:26 after 11 seconds of playing.

Are you aware of all number bonds?

## Game instructions for number bonds

What other numbers, together with the given number, adds up to the sum? Each level generates up to 10 number bonds for the chosen 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 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 *Give up*.
When you practice the number bonds in this game knowledge, your mental arithmetic is also excercised and it will be easier to count.

### Calculation of knowledge points

Each completed level results in 1 knowledge point. The maximum number of points (25 knowledge points) is achieved when you complete all 25 levels. You'll get a bronze medal when you complete a level 2 times and a silver medal after 5 completed rounds. A gold medal will be received after 10 completed rounds. In Number bonds, the maximum number of collectable gold medals is 25. You only earn knowledge points for levels that has not been cleared before. A cleared level has a green background above. Even when you have completed a level, you can continue practicing at that level, but it gives you no more knowledge points.### Similar games

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