7th grade Math

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I have two questions for math.

How do I add/subtract an integer
Please give me full notes, or webpage please.

Also, my teacher said 10-20E (Problems in book we have to do)
Is that evens? because the odd answers are in the back of the text book

Thanks,

  • 7th grade Math -

    These sites have great explanations of adding and subtracting integers.

    http://www.mathgoodies.com/lessons/vol5/addition.html

    http://www.mathgoodies.com/lessons/vol5/subtraction.html

    The assignments probably are only for the even numbered problems because of the "E" after the numbers.

    Of course, it wouldn't hurt to do all of the problems -- especially since you can check your answers to the odd-numbered problems.

  • 7th grade Math -

    Thanks Ms. Sue you help with everything!!!

  • 7th grade Math -

    You're welcome, Dean.

  • 7th grade Math -

    6.7 x 10 to the 4th power
    7.6 x 10 to the 4th power
    8.9 x 10 to the 3rd power
    9.8 x 10 to the -3rd power

    put in order from least to greatest

  • 7th grade Math -

    how do you find the interest and balance of the account.
    ($278) at 8% for 9 months?

  • 7th grade Math -

    Change percent to a decimal
    =0.08x278x9
    =200.16

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