Okay, today is the first day of me homeschooling my son. Question is?

Question

How in the hell do you find the common denomenator? It has been so long, I don't remember! LOL Help please?

Thank you everyone for your help! It sounds bad but I'm pretty rusty at my fractions anymore! LOL
Thanks again, I really appreciate it.

Answer 1

LCD = Lowest Common Denominator. The smallest number evenly divisible by both denominators (ie. no remainders).
Example:

1/3 + 1/4

The lowest common denominator is 12.
1/3 x 4 = 4/12
1/4 x 3 = 3/12

4/12 + 3/12 = 7/12.

Answer 2

hi... hope this helps...

for "like terms", the denominator is the common denominator.

for example:
1/5 ; 3/5
the common denominator is 5

for "unlike terms", to obtain the "common denominator" (also known as the "LCD" or "least common denominator"), usually what is done is:

if there are only two terms involved; just multiply the
denominators, then you have the lowest terms:
example: 1/5 & 2/3
denominators : 5 & 3
multiplying : 5 x 3 = 15
therefore : common denominator = 15


if there are more than two terms involved; look for a
number that can be divided by all of the denominators
given, then you have the lowewst term:
example: 3/4 ; 2/3 & 1/2
denominators : 4; 3 & 2
number dibvisible by 4, 3 & 2: 12
therefore : common denominator = 12

remember: 2 terms (fractions) just multiply the denominators
more than 2 terms, look for a number that can be
divided by all of the denominators given

"multiply" or "divide".... :) good luck!

Answer 3

Times the 2/3 denominators together

Answer 4

Largest number both bottom numbers can fit in to

ie... 3/4 2/3 5/6 - common denominator is 12

Answer 5

Here's an example for you...

http://en.wikipedia.org/wiki/Least_common_denominator

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