Watch Video on Lowest Common Denominator - Pre Algebra Help
Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/leastcommondenominator.php 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.
Duration : 0:1:18
[youtube GvyMUkxDbcE]
Tags: adding, addition, Denominator, denominators, fraction, fractions, least, subtracting, subtraction, unlike
September 10th, 2009 at 7:10 pm
haha i just learned …
haha i just learned this in 6th..i Fail
September 10th, 2009 at 7:10 pm
I would like to …
I would like to break her. I bet she’s dirty.
September 10th, 2009 at 7:10 pm
this girl talks …
this girl talks like a complete ot
September 10th, 2009 at 7:10 pm
i need : finding …
i need : finding common denominators. then addinh :’( fot nigth nigths homeworkk
September 10th, 2009 at 7:10 pm
thankyou
thankyou
September 10th, 2009 at 7:10 pm
waaaahhh?
waaaahhh?
September 10th, 2009 at 7:10 pm
i need math super …
i need math super help so I can advance my education further… grrr if only I was a math genius!
September 10th, 2009 at 7:10 pm
I Im not kidding …
I Im not kidding you but my my math skills are horrorible. Im becoming a Junior in highschool and I remember doing this in my finals as a sophmore. Too bad I got a low score because I just had to be sick during my finals.
September 10th, 2009 at 7:10 pm
simple. this is not …
simple. this is not algebra. this is adding fraction.
September 10th, 2009 at 7:10 pm
6th grade? i …
6th grade? i learned this in 4th grade
September 10th, 2009 at 7:10 pm
I learned this in …
I learned this in 3rd grade. Not kidding!!
September 10th, 2009 at 7:10 pm
Then why the …
Then why the are you watching it…
Oh I know cause <…you don’t know it
I hate people like you who think they know everything man if you really think this was retarted then you would have not searched it on youtube. Now stop critizing people and give her some credit she took her time to make a video to inform people when she could be hanging out with friends doing personial things. SO PLZ SHUT THE UP
September 10th, 2009 at 7:10 pm
how old are you? …
how old are you? you look like your pretty young to teach.
September 10th, 2009 at 7:10 pm
lolol this isnt …
lolol this isnt pre-algebra this is like 6th grade math
September 10th, 2009 at 7:10 pm
thats why they call …
thats why they call you a crackmonkey now.
September 10th, 2009 at 7:10 pm
i need some fool …
i need some fool proof way to find the lowest common denominator so i can go through my home work faster ….. any one know?
September 10th, 2009 at 7:10 pm
…
uggggggggggggggggggggg this is soooooooooooooooooo retarteed
September 10th, 2009 at 7:10 pm
i stoll dont no!!!
i stoll dont no!!!
September 10th, 2009 at 7:10 pm
errrr lol? thats …
errrr lol? thats soooo easy
September 10th, 2009 at 7:10 pm
no duh, this was so …
no duh, this was so stupid! we learned this stuff like 2 years ago in fifth grade. I’m in seventh taking algebra. This is stupidly easy.
September 10th, 2009 at 7:10 pm
you are speaking …
you are speaking the truth because my army recruiter told me to study my multiplications and i did then this became easy
September 10th, 2009 at 7:10 pm
Not being smucky… …
Not being smucky….learn your multiplication facts and these will become easier to unriddle. She is looking for a number that each number can be divided into; each can divide into the number (also known as a multiple)eight. Eight can be divided by eight and eight can be divided by 2.
September 10th, 2009 at 7:10 pm
Don’t feel bad, …
Don’t feel bad, been there!
September 10th, 2009 at 7:10 pm
the guy’s the best …
the guy’s the best teacher
September 10th, 2009 at 7:10 pm
i still dont get it …
i need an IEP in math 
thanks for the effort 
;(
i still dont get it