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HorseCrazyGirlForever Group Title

How do I add fractions?

  • one year ago
  • one year ago

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  1. Esteven Group Title
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    Are the denominators the same?

    • one year ago
  2. HorseCrazyGirlForever Group Title
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    No.

    • one year ago
  3. Eulie Group Title
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    www.webmath.com/addfract.html

    • one year ago
  4. Eulie Group Title
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    www.youtube.com/watch?v=lavgnJAkfKM

    • one year ago
  5. Eulie Group Title
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    those might help

    • one year ago
  6. HorseCrazyGirlForever Group Title
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    I don't like to watch videos because I never learn from them... :(

    • one year ago
  7. Eulie Group Title
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    oh sorry then

    • one year ago
  8. Zarkon Group Title
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    \[\frac{a}{b}+\frac{c}{d}=\frac{a\times d+c\times b}{b\times d}\]

    • one year ago
  9. SheldonEinstein Group Title
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    What @Zarkon did , is said to be use of LCM ..

    • one year ago
  10. screamincat Group Title
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    If the denominator is not the same then you will have to find the most common one. then add the top numbers and keep the denominator same. Been awhile sence i done then.

    • one year ago
  11. ethompsonn Group Title
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    |dw:1351266657384:dw|

    • one year ago
  12. ParthKohli Group Title
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    \[{\heartsuit \over \spadesuit}+{\diamondsuit \over \clubsuit} = {\heartsuit\clubsuit + \diamondsuit \spadesuit \over \spadesuit \clubsuit}\]

    • one year ago
  13. SheldonEinstein Group Title
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    LCM ---> Least common multiple just like I want to give you an example of LCM in addition of fractions : \[\large{\frac{3}{4} + \frac{4}{5} = ?}\] Now, to add these fractions , we need to take LCM of the denominators of both of the fractions... i.e. of 4 and 5 Multiples of 4 = 4,8,12,16,20,32,36,40 .... Multiples of 5 = 5,10,15,20,25,30,35,40... Common multiples = 20, 40 , ... Least common multiple = 20 So from this we get LCM of 4 and 5 is 20 Now divide 20 by 4 , you get 5, multiply 5 by the numerator of the first fraction i.e. 5 * 3 = 15 .Similarly for second fraction, divide 20 by 5, you get 4, multiply 4 by 4 = 16 \[\large{\frac{5*3 + 4*4}{20} = \frac{15+16}{20} = \frac{31}{20} }\]

    • one year ago
  14. ParthKohli Group Title
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    Although, you can straightforwardly add the numerators if the denominators are same.

    • one year ago
  15. ParthKohli Group Title
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    Why we use LCM is to get to a point where we can straightforwardly add the numerators.

    • one year ago
  16. HorseCrazyGirlForever Group Title
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    SO what would 4/3 + 7/6 =

    • one year ago
  17. ParthKohli Group Title
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    Get a common denominator.

    • one year ago
  18. SheldonEinstein Group Title
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    Instead of LCM you can also do "common denominators" : \[\large{\frac{4}{3} + \frac{7}{6} = ? }\] Let us take 4/3 first : multiply denominators and numerators by 2 \[\large{\frac{4\times 2}{3\times 2} = \frac{8}{6}}\] So, we can also write 4/3 as : 8/6 Now let us take L: 7/6 See we have to get common denominators in both the fractions. we have one fraction as 8/6 and another one is 7/6 Their denominators are same i.e. 6 so we can just add numerators "now" : \[\large{\frac{8}{6} + \frac{7}{6} = \frac{8+7}{6} = \frac{15}{6}}\]

    • one year ago
  19. SheldonEinstein Group Title
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    Note: Don't add denominators, only numerators are to be added.

    • one year ago
  20. SheldonEinstein Group Title
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    @HorseCrazyGirlForever I hope you got it now, any confusion you have now?

    • one year ago
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