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Help Me~ Random Math Question

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#1 KLC77

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    Posted 27 August 2008 - 12:47 PM

    My niece needs help with her math packet for school and I'm the only one who knows anything about math in my family. Only problem is I can't remember if I know how to divide fractions correctly.

    Do you just multiply by the reciprocal? For example 2/3 divided by 3/8 would be 2/3 times 8/3 equalling 16/9? Does that even make sense? lol Ugh, 7th grade math! TIA

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    #2 MissyR

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      Posted 27 August 2008 - 12:49 PM

      That is exactly right!

      Dividing Proper/Improper Fractions
      dividend ΒΈ divisor = quotient

      1. Change mixed numbers to improper fractions.

      2. Change the dividing sign to multiply and flipflop (take the reciprocal of) the divisor.

      3. Multiply the numerators and multiply the denominators

      4. Change to mixed numbers if necessary.

      5. Reduce to lowest terms.

      #3 Nrvsbride

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        Posted 27 August 2008 - 12:50 PM

        OMG I almost broke out in a sweat. I swear I know nothing about math (it was my worth subject) which is why I became a lawyer. I'm pretty sure you multiply by the recipricol but knowing my pathetic 83 in 7th grade math I'm more likely than not wrong. Hopefully someone who is good at math like Christa or Ann can help you out.

        #4 KLC77

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          Posted 27 August 2008 - 02:21 PM

          Thanks Missy! I just want to tell her not to worry about it because she most likely will never use it again, but I'm trying to be a good aunt. lol So, off to divide fractions I go...

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          #5 ErinB


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            Posted 27 August 2008 - 02:27 PM

            Wow , I feel really dumb now. I rocked out in math until the 8th grade, then it all went down hill.

            I remember FOIL and a^2 + b^2 = c^2 and that's about it.

            #6 KatyKo

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              Posted 27 August 2008 - 02:30 PM

              That is right :) I thought I would never use that again until I started studying for the GRE...you definitely need to remember 7th grade math for the GRE...fun!!

              #7 Kristy!


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                Posted 27 August 2008 - 02:40 PM

                I remember my 7th grade math teacher teaching us the Recipricol Rumba. "Stay, change, flip, cha cha cha."

                #8 JoLo908

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                  Posted 27 August 2008 - 02:50 PM

                  Perfect example of why I am becoming an English teacher!

                  #9 becks



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                    Posted 27 August 2008 - 03:45 PM

                    My third grade math teacher gave me this little ditty to remember how to divide fractions:

                    Mine is not to question why, just invert and multiply.

                    Has stuck with me ever since.

                    Happily married since 2008

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                    #10 aimee!

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                      Posted 28 August 2008 - 09:25 PM

                      haha so funny how this stuff sticks with us. i was thinking about conjunctions at work today.

                      and, but, or, nor, for, yet, so *lets go!*

                      good times. :) but seriously- anybody have great plans for the weekend?
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