Natural numbers   »      
Add and subtract in ℕ
-expert-

 When you start the web page, a calculation chain
with natural numbers has been created.

Your task is to find
the missing numbers in the calculation chain and to complete them.


Click on  check  to check your answer.

Click on  new  to create a new problem.

Can you top 309 points?


Add and subtract in ℕ
Calculation chain -expert-

 Complete the calculation chain!
  
  
        

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