Natural numbers   »      

At the start of the website an
addition problem
was created with four natural numbers.

Your task now is to
determine the result.

If you are skillful,
you can use arithmetic laws.

Click on  check  to check your answer.

Click on  new  to create a new problem.

Can you top 395 points?


Adding natural numbers
Apply arithmetic laws -2-

       

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  • Associative Law
    When adding, you may place parentheses as you wish without changing the result:

    ((30 + 23)) + 47 = 30 + ((23 + 47))
    53 + 47 = 30 + 70
    100 = 100

    General:
    ((a + b)) + c = a + ((b + c))
       a,b,c ∈ ℕ0
  • Commutative Law
    When adding, you can swap the order of the summands as much as you want without changing the result:

    58 + 42 = 42 + 58
    100 = 100

    General:
    a + b = b + a    a,b ∈ ℕ0