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Need a refresher please! (math)

okay so im studying for a college placement test because i plan on going back to college this fall, since ive been out for 5 years i have to retake the placement test.

my weakness is algebra- fractions, decimals, mixing numbers & letters together- LOL!

so when you have a problem like: 3 1/2 + 4 2/3 are you suppose to find a common denominator? or do you simply add 3 +4 and add the numerators and denominators? or do you multiply the whole number and the denominator, then add the numerator so you get 7/2 + 14/3, then find a common denominator?

ugh, so confusing... i wish i could skip over the math portion altogether. im not asking for the answer, just HOW to find the answer.

Answer Question
 
tnm786

Asked by tnm786 at 11:14 AM on May. 6, 2013 in

Level 43 (159,608 Credits)
Answers (5)
  • You have to convert the fractions so the denominators match, so you'd make the numbers 3 3/6 and 4 4/6, then 7 7/6, which would convert to 8 1/6 to be a proper fraction.
    Ginger0104

    Answer by Ginger0104 at 11:22 AM on May. 6, 2013

  • Change the fractions into something each can be divided into
    3 1/2 + 4 2/3
    3 3/6 + 4 4/6
    7 7/6
    81/6
    Dardenella

    Answer by Dardenella at 11:32 AM on May. 6, 2013

  • ahh okay! i see how you changed the fractions but im not understanding how to get 8 1/6 from 7 7/6?
    tnm786

    Comment by tnm786 (original poster) at 11:53 AM on May. 6, 2013

  • 7/6 is an improper fraction. It would be converted to 1 1/6, add that to the 7 from earlier and you get 8 1/6
    Rosehawk

    Answer by Rosehawk at 12:36 PM on May. 6, 2013

  • ohhh okay i get it now thanks so much!!
    tnm786

    Comment by tnm786 (original poster) at 1:28 PM on May. 6, 2013

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