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Math Help - Could someone check my integer homework?

  1. #1
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    Could someone check my integer homework?

    merci
    Last edited by Lolcano; June 9th 2010 at 06:21 AM.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Lolcano View Post
    Please? Thanks

    -26+21= -5

    -12.7 + 7.8= -4.9
    these two are fine

    -12 2/3 + (13 7/8) = 26 13/24
    now lets think about this. we have 13 and a little bit and we take away 12 and a little bit...how is it we get 26 and a little bit???

    20 - (-20)= 0
    this is also wrong. you did not distribute the minus sign.

    -1.6 - 0.8= -0.8
    you start with a negative number that is less than negative one and you subtract something from it. the result must be less than negative one also. you can think of it this way if it makes it any easier. factor our the negative sign, we see that -1.6 - 0.8 = -(1.6 + 0.8)

    now work that out, and remember the minus sign in front

    5 1/3 - 4 1/2 = 5/6

    -25 x 4= -100
    these are correct

    -1.2 x (-0.5) = -0.6
    incorrect. a negative times a negative is positive

    -34 (-17) = 2

    0.456 -4 = -0.114

    5/9 x (-2 2/5) = -1 1/3

    -3/5 7/10 = -6/7
    these are correct
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  3. #3
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    merci
    Last edited by Lolcano; June 9th 2010 at 06:22 AM.
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  4. #4
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    Quote Originally Posted by Lolcano View Post

    -1.2 x (-0.5) = 0.6
    Fine

    Quote Originally Posted by Lolcano View Post

    -1.6 - 0.8= -2.4
    Brilliant

    Quote Originally Posted by Lolcano View Post
    20 - (-20)= 40
    Correct

    Quote Originally Posted by Lolcano View Post
    -12 2/3 + (13 7/8) = 1 5/24
    correct again
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  5. #5
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    Thank you both so much!
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