25-1 divided by 3 (18 +9) i know it equals 16 but I have no clue at all how i got it help!!!!!!!!?

i feel real stupid folks please help!

1 Answer

  • Merlin
    Lv 7
    1 decade ago
    Favorite Answer

    I had to work for a bit to find your answer in this.....parentheses would help. I think it reads:

    25 - (1/3)(18 + 9).........first the last group in brackets is done

    25 - (1/3)(27).........now 1/3 times 27

    25 - 9.........and finally


    Remember PEMDAS (Please Excuse My Dear Aunt Sally). We do parenthesis first. To do this does require addition of 18 and 9 but required to get rid of the parenthesis. Next we do the multiplication of 1/3 times 27. Finally we do the subtraction.

    Look at the 2 sites I've linked below. Other than that, it's just practice. Soon it will have a natural order....you won't even need to think about it.

    Good luck

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