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Watch Video on Lowest Common Denominator - Pre Algebra Help

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Access full lesson containing this video at: http://www.yourteacher.com/pre... Students learn to add unlike fractions by first finding a common denominator. For example, to add 1/2 + 1/3, first find the common denominator of 2 and 3, or the Least Common Multiple of 2 and 3, which is 6. Then multiply the numerator and denominator of 1/2 by 3, to get the equivalent fraction 3/6, and multiply the numerator and denominator of 1/3 by 2, to get the equivalent fraction 2/6. Next, add the like fractions, 3/6 + 2/6, to get 5/6. So 1/2 + 1/3 = 5/6. Students also learn to subtract unlike fractions by following the same process that is used when adding unlike fractions.

Channel: Education
Uploaded: December 31, 1969 at 6:59 pm
Author: yourteachermathhelp

Length: 01:18
Rating: 5.00
Views: 6537

Tags: adding  addition  denominator  denominators  fraction  fractions  least  subtracting  subtraction  unlike  

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Video Comments

TriplicityX (December 31, 1969 at 6:59 pm)
That's freaken easy.
xXxRawRxXx22 (December 31, 1969 at 6:59 pm)
That helped! :)
Chase0782 (December 31, 1969 at 6:59 pm)
okay think of it like this..for 2's "2,4,6,8" and for 8's "8,16,24,32"..what will 2 and 8 LEAST go into each other..so if 2 goes into 8 four times (2x4) and of course 8 goes into 8 one times (8x1)..that's the least common denominator for these numbers 2 and 8..after that, all you do is..you know 2x4=8 right? so simply multiply the numerator 1 by 4 (4x1) which is four, and now it should be 4/8..next on 3/8 8x1=8 right?..so now multiply 3x1=3..then it's 3/8..now just add 4/8 + 3/8 = [7/8]<- answer
miriyaa (December 31, 1969 at 6:59 pm)
Too difficult, only a genius can understand that. That's was too fast, slower please!
bdub24j (December 31, 1969 at 6:59 pm)
Yeah, I guess that's true. Unfortunately my mind uncontrollably wants to regurgitate math formulas. I envy anyone who this stuff comes natural.
funkyboy90000 (December 31, 1969 at 6:59 pm)
lol it is once u get the concepts
bdub24j (December 31, 1969 at 6:59 pm)
They make things look so simple.
skater855 (December 31, 1969 at 6:59 pm)
o i see thank u so much
skater855 (December 31, 1969 at 6:59 pm)
thank u but y do u multiply by 4
daitcho (December 31, 1969 at 6:59 pm)
hi, thank you soooo much again thank youuuuuuuu is good again

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