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Umm Im in 5th grade and I do not under stand this at all because I don't know what the brakets are and how do you you use them heres the question 108 + 3[15 - (3 + 9)]=?

  • Math -

    First do the stuff in parentheses.

    (3 + 9) = 12

    Then, do what's in the brackets.

    [15 - 12] = 3

    Next, multiply:
    3 * 3 = 9

    The last step:

    108 - 9 = 99

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