Forget about the whole numbers for a moment. Let's look at the fractions. First you have to find a common denominator (make the bottom numbers the same) by finding the lowest common multiple (LCM) In this case, you have 2,3, and 8. So the LCM is 24 because 2,3, and 8 can all be divided into 24. Then you look at how many times you had to multiply the denominators to make them 24 and you multiply the same # to the numerators (top #). So you end up with 12/24 + 8/24 + 9/24. (You had to multiply 2 by 12, 3 by 8, and 8 by 3) So now that you have the same denominators, simply add the numerators. 12+8+9=29. So you end up with 29/24. But since you have an improper fraction (more on the top than on the bottom) you have to make another group of 24 and bring it over to be added with the whole numbers. But you still have 5 left (29-24=5) so you end up with 5/24 as your final fraction. Now just add the whole numbers. (4+3+4=11, plus the 1 you grouped from the fractions, so 12) So your final answer is 12 5/24.
That was a long explanation. I hope you understand. Good luck.
2006-08-26 17:45:57
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answer #1
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answered by question 3
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4 1/2 + 3 1/3 + 4 3/8
9/2 + 10/3 + 35/8
Multiply 2 x3 x8 to get common denominator = 48
Divide 2 into 48 = 24 . Multiply 9 x 24 = 216
Divide 3 into 48 = 16. Multiply10 x 16 =160
Divide 8 into 48 = 6 Multiply 35 x 6 = 210
You then have 216/48 + 160/48 + 210/48 = 586/48
Divide 48 into 586 and the final answer is 12 10/48 or 12 5/24
2006-08-27 01:49:08
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answer #2
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answered by brainstorm 7
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Okay, this is how they taught me. First turn all the numbers into fractions:
9/2 + 10/3 + 35/8
now you need to find the common denominator, something divisible by all three denominator. In this case, the lowest common denominator is 24 (the way I come up with it is to multiply all three denominators 2x3x8=48 then start halving the answer until it doesn't work, in other words from 48 I would go to 24 and see that all 3 still divide evenly but if I go on to 12, 8 won't go into it evenly so I stop with 24. By looking at the denominator of each fraction, I can see what to multiply the numerator by to make the fraction 24ths. 2 goes into 24 12 times, 3 goes into 24 8 times and 8 goes into 24 3 times. So this gives the equation:
108/24 + 80/24 + 105/24 which is:
(108 + 80 + 105)/24 or 293/24 which is 12 6/24 or 12 1/4
Hope you could follow this.
2006-08-27 00:31:57
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answer #3
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answered by sparkletina 6
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First find a common denominator. The number on the bottom of the fraction. In this case that would be 24. Then take for instance the number 1/2 and find how man times 2 goes into 24...in this case it would be 12x1=12. Then 3 goes into 24, 8x1=8, Then 8 goes into 24, 3x3 which would equal 9. So this is how your question now reads
4 12/24 + 3 8/24 + 4 9/24=
Then add together, but keep the common denominator as 24
=11 29/24
Then you can not leave the fraction as is because the top number is bigger then the denominator. Thus reducing to 12 5/24 which is your answer.
2006-08-27 00:29:35
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answer #4
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answered by sunset74 2
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you first have to find a common denominator for the fractions
in this case it is 24
4 1/2 = 4 12/24
3 1/3 = 3 8/24
4 3/8 =4 9/24
Now add them together.
for a total of 11 29/24
which result in a total of : 12 5/24
2006-08-27 00:23:30
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answer #5
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answered by Anonymous
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I doubt your teacher is retarded, they wouldn't let her teach. She however may not be great at math herself.
Find the common denominator for all the fractions and then just add the whole numbers and then the fractions. And no I'm not telling you the common denominator, you gotta do some of the work yourself.
2006-08-27 00:21:46
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answer #6
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answered by Lizzy-tish 6
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I know how to do this but I'm horrible at explaining. I found this web site that may help you.
http://www.superkids.com/aweb/tools/math/fraction/commond/add.shtml
2006-08-27 00:21:45
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answer #7
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answered by Moxie 3
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