Results 1 to 10 of 10

Math Help - checking my answers please help

  1. #1
    Newbie
    Joined
    Nov 2010
    Posts
    5

    checking my answers please help

    Hi
    I just wanted someone to check my answers and make sure this is right before i submit it.
    Q.The product of 25.26 and 3/8
    A. 9.4725

    Q. 3 1/8 divide 5/7 (fractions)
    A. 3 47/56 (three and 47 over 56)

    If someone can let me know if ive done this right please
    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    Joined
    Nov 2007
    From
    Trumbull Ct
    Posts
    909
    Thanks
    27
    Hi kamie87,

    One right,one wrong.


    bjh
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Nov 2010
    Posts
    5
    can u tell me which one and what im doing wrong??? please please please
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Nov 2010
    Posts
    5
    ok the second one is majorly wrong.... can you tell me how to work it out? maybe a similar problem for practice?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Nov 2010
    Posts
    5
    if i do it on the calculator i get 4 3/8 but how do i work it out without a calculator?
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,623
    Thanks
    428
    3 \frac{1}{8} \div \frac{5}{7}

    \frac{25}{8} \div \frac{5}{7}<br />

    \frac{25}{8} \times \frac{7}{5}

    \frac{25 \times 7}{8 \times 5} = \frac{5 \times 7}{8 \times 1} = \frac{35}{8} = 4 \frac{3}{8}
    Follow Math Help Forum on Facebook and Google+

  7. #7
    MHF Contributor
    Joined
    Dec 2007
    From
    Ottawa, Canada
    Posts
    3,102
    Thanks
    68
    Quote Originally Posted by kamie87 View Post
    Q. 3 1/8 divide 5/7 (fractions)
    3 1/8 = 25/8 ; ok?

    RULE: (a/b) / (c/d) = (a/b) * (d/c)

    Wrap it up!
    Follow Math Help Forum on Facebook and Google+

  8. #8
    Newbie
    Joined
    Nov 2010
    Posts
    5
    thankyou for the help...
    so you flip the second fraction upside down
    and in the fourth line it changed from 25x7 to 5x7 and 8x5 to 8x1?? im a little lost to how that works sorry
    Follow Math Help Forum on Facebook and Google+

  9. #9
    MHF Contributor
    Joined
    Dec 2007
    From
    Ottawa, Canada
    Posts
    3,102
    Thanks
    68
    Follow Math Help Forum on Facebook and Google+

  10. #10
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,623
    Thanks
    428
    Quote Originally Posted by kamie87 View Post
    thankyou for the help...
    so you flip the second fraction upside down
    and in the fourth line it changed from 25x7 to 5x7 and 8x5 to 8x1?? im a little lost to how that works sorry
    \displaystyle \frac{25 \times 7}{8 \times 5} = \frac{5 \times 5 \times 7}{8 \times 5}

    so ... what happens to one of the 5's in the numerator and denominator?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Checking answers (Calculus 1)
    Posted in the Calculus Forum
    Replies: 1
    Last Post: July 26th 2010, 09:03 AM
  2. Checking my answers
    Posted in the Algebra Forum
    Replies: 3
    Last Post: January 12th 2009, 11:59 PM
  3. Just checking my answers.
    Posted in the Discrete Math Forum
    Replies: 4
    Last Post: May 13th 2008, 07:33 AM
  4. Checking answers.
    Posted in the Algebra Forum
    Replies: 1
    Last Post: March 13th 2007, 03:38 PM
  5. checking my answers !! please have a look!!
    Posted in the Statistics Forum
    Replies: 2
    Last Post: October 30th 2006, 03:29 PM

Search Tags


/mathhelpforum @mathhelpforum