Natural numbers   »      

Adding and subtracting
Form sums and differences

On this page you can learn about adding and subtracting natural numbers.
Move the blue digits with the mouse or the keys and form the corresponding task.

Note:
Always two digits form a number.

Click on  check  to check your answer.
Click on  new  to create a new problem.

Can you top 395 points?


Topic: Natural numbers
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