Natural numbers   »      

At the start of the web page a
problem
with natural numbers was created.

Your task is
to specify the missing number in place of x.

If you are clever
you can use the distributive law.

Click on  check  to check your answer.

Click on  new  to create a new problem.

Can you top 395 points?


Topic: Natural numbers
Apply arithmetic laws -4-

Which number is x?
       

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  • Distributive Law -1-
    Each value in the brackets is multiplied by the factor in front of the brackets.

    3 × 17 + 3 × 13 = 3 × ((17 + 13))
    51 + 39 = 3 × 30
    90 = 90

    General:
    a × b + a × c = a × ((b + c))
       a,b,c ∈ ℕ0
  • Distributive Law -2-
    Each value in the brackets is multiplied by the factor in front of the brackets.

    8 × 27 - 8 × 17 = 8 × ((27 - 17))
    216 - 136 = 8 × 10
    80 = 80

    General:
    a × b - a × c = a × ((b - c))
       a,b,c ∈ ℕ0