Natural numbers   »      
Add and subtract natural numbers
Special problems with brackets

 Example:
Hint:
[165 - ((74 + 31))] + [127 - ((69 + 34))]
    Calculate the round brackets first,
    = [165 - 105] - [127 - 103]
    then the square brackets.
    = 60 - 24
= 36     

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Can you top 295 points?


Add and subtract in ℕ
with brackets -top expert-

Calculate the round brackets first.
=
Then calculate the square brackets.
=
The result gets 20 points more.
=
 
 
        

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