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.

Pay special attention to arithmetic laws and rules.


Click on  check  to check your answer.

Click on  new  to create a new problem.

Can you top 275 points?


Topic: Calculate in ℕ
... with arithmetic laws -4a-

Which number is x?
       

Enable keyboard
  • 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