# Addition

16 minutes ago: Someone got **all questions correct** at level *13. One term is 13* which took 2 minutes.

18 minutes ago: Someone got **all questions correct** at level *12. One term is 12* which took 2 minutes.

20 minutes ago: Someone got **all questions correct** at level *11. One term is 11* which took 2 minutes.

22 minutes ago: Someone got **all questions correct** at level *10. One term is 10* which took 44 seconds.

23 minutes ago: Someone got **all questions correct** at level *9. One term is 9* which took 49 seconds.

24 minutes ago: Someone got **all questions correct** at level *8. One term is 8* which took 1 minute.

25 minutes ago: Someone got **all questions correct** at level *7. One term is 7* which took 49 seconds.

26 minutes ago: Someone got **all questions correct** at level *6. One term is 6* which took 47 seconds.

27 minutes ago: Someone got **all questions correct** at level *5. One term is 5* which took 48 seconds.

27 minutes ago: Someone got **all questions correct** at level *4. One term is 4* which took 46 seconds.

Choose one of the two terms and calculate the sums!

## Game instructions for addition

Choose a number from the buttons above. This will give you up to ten tasks that you must solve by adding together the two numbers and find the sum.
Can you solve all the additions in a level, you will get one knowledge points and the button for that level turns green.

### Addition in the language of mathematics

Addition belong to the four basic arithmetic operations and the correct mathematical way of talking about it is:

*adding two numbers*.

Two terms add up to the sum:

### Calculation of knowledge points

Each completed level results in 1 knowledge point. The maximum number of points (35 knowledge points) is achieved when you complete all 35 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 Addition, the maximum number of collectable gold medals is 35. 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.

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