I need the break down on how to get the answer please. 8 21/22+3/4-5/12=? The eight is a mix number with twenty one and twenty two
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Originally Posted by Math Noob I need the break down on how to get the answer please. 8 21/22+3/4-5/12=? The eight is a mix number with twenty one and twenty two Im not sure what the 8 is doing there, but let's pretend that it isnt because the idea is the same. You need to find a common denominator here... Do you know how?
the eight is the whole number of 8 21/22 you have to multiply 22 by 8 and then add the 21 correct? i got that part figured out now what's next? find the common denominator of each fraction?
Originally Posted by Math Noob I need the break down on how to get the answer please. 8 21/22+3/4-5/12=? The eight is a mix number with twenty one and twenty two Find the LCM of 22, 4 and 12 which is 132 also that 8 can also be written as
Originally Posted by Math Noob the eight is the whole number of 8 21/22 you have to multiply 22 by 8 and then add the 21 correct? Correct! Sorry that I didn't notice that, by the way. So we will have... So, now what should we do? The common denominator, right.
how did you find the common denominator so fast?
Originally Posted by Math Noob how did you find the common denominator so fast? Using prime factors. 22 = 2 x 11 12 = 2 x 2 x 3 Multiply any unique prime factors: 2 x 2 x 3 from 12 and 11 from 22:
Originally Posted by Math Noob how did you find the common denominator so fast? I will stand down now.
lol im still trying to figure it out
the answer is 9 19/66
Originally Posted by Math Noob lol im still trying to figure it out As this does not ask for the LCM you don't need to use it - you can cross multiply if you wish I don't see why you don't number crunch it?
Last edited by e^(i*pi); September 13th 2009 at 09:15 AM. Reason: oops wrong sign
because i am a noob, and would love to know how to number crunch
By using a calculator and putting in the numbers LCM is 132 which should give the answer
I have a ti-84 plus i just purchased, I'm trying to figure out how to use it.
I edited my above post to include the answer
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