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Old 08-10-2010, 06:41 AM   #1
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Default Answered: eh anyone know what to do?

LOL I got algbra homework and I wondering if someone could answer my question. My brain has totally went blank. Ok in this one equation, it says 1/2 - 1/3 I know I supposed to get the GFC (greatest common factor) but, what do I do with the top numbers?? LOL can some pleas answer this...
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Best Answer - Posted by dragonbird
The reason you get the GCF is because you can only add and subtract fractions if the denominator is the same with both fractions...Once you find the GCF you will be changing each number (1/2 and 1/3 so that they have the same denominator)...

Since 2/2=1 and 5/5=1 and so on you can change the numbers of the fraction without changing the actual value...

I have a real issue giving you the answer (it's the mom in me) but for an example let's say:

1/4 +/-3

The GCF for this is 12 so you can multiply 1/4 by 3/3 to get 3/12 and you can multiply 1/3 by 4/4 to get 4/12 so now you have:

3/12 + 4/12= 7/12 since you only add the numerators and the denominator stays the same with adding and subtracting fractions...

I hope that example helps to jog your memory and you are able to solve your problem...Good luck, I Know you can do it!
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Old 08-10-2010, 06:47 AM   #2
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Default Re: eh anyone know what to do?

The reason you get the GCF is because you can only add and subtract fractions if the denominator is the same with both fractions...Once you find the GCF you will be changing each number (1/2 and 1/3 so that they have the same denominator)...

Since 2/2=1 and 5/5=1 and so on you can change the numbers of the fraction without changing the actual value...

I have a real issue giving you the answer (it's the mom in me) but for an example let's say:

1/4 +/-3

The GCF for this is 12 so you can multiply 1/4 by 3/3 to get 3/12 and you can multiply 1/3 by 4/4 to get 4/12 so now you have:

3/12 + 4/12= 7/12 since you only add the numerators and the denominator stays the same with adding and subtracting fractions...

I hope that example helps to jog your memory and you are able to solve your problem...Good luck, I Know you can do it!
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Old 08-10-2010, 06:52 AM   #3
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Default Re: eh anyone know what to do?

LOL thanks it actually did make me remember LOL thanks again
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Old 08-10-2010, 08:27 AM   #4
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Default Re: eh anyone know what to do?

Hm, I don't know, LOL. But dragonbird is right. I tried to do it. Is it 1/6. Probably not....
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