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2007-05-06 11:42:04 · 6 answers · asked by kathy 1 in Science & Mathematics Mathematics

6 answers

you change it to an improper fraction.. example
1 1/3 to a improper fraction is 4/3 then you multiply it like you would any other fraction...

2007-05-06 11:46:42 · answer #1 · answered by Zoe 3 · 0 0

First you convert your mixed fraction to a true fraction form

Suppose you have a fraction 2 3/4 You multiply the 2 by the denominator of the fraction and add to the numerator and the result is (2*4+3)/4=11/4

Another way to look at it is to think of 2 3/4 as 2+3/4 = 8/4+3/4=11/4

So once you covert mixed fractions to a true fractional form you multiply them as normal

a/b * c/d = (a*b)/(c*d)

Suppose you are multiplying 3 2/7 * 4 1/6

3 2/7=(3*7+2)/7=23/7
4 1/6=(4*6+1)/6=25/6

3 2/7 * 4 1/6 = 23/7 * 25/6 = 23*25/(6*7)=575/42

To convert this to a mixed fraction divide 575 by 42 and just take the integer portion which is 13. 575-13*42=575-546=29

So the result is

575/42=13 29/575

2007-05-06 11:56:46 · answer #2 · answered by Astral Walker 7 · 0 0

You times the first mixed number by the denominator with the whole number, then add the answer with the numerator, then you’ll get the improper fraction, leave the multiple sign, than do the same thing to the next mixed number. Try to do the crossed-multiple thing by looking at the (example:5/10 times 2/5) you look at the opposite number of 5 and 5, you divide it by each other, than look for the next number as 2 and 10, you only can divide both of it by 2 then you’ll get this form(1/5 times 1/1), then you times the numerator with the numerator, and the denominator with the denominator. Then you’ll get the answer. Hope this will help.

2007-05-06 12:02:37 · answer #3 · answered by sovisal 2 · 0 0

first you turn the mixed number into a improper fraction then you see if you can divide ant thing into the numerator and the denominator and then you multiply and then reduce

2007-05-10 09:02:14 · answer #4 · answered by mike m 1 · 0 0

you take the whole number and multiply it by the denominator, then you add that number to the numerator and put it over the denominator, which will give you an improper fraction, you do the same your to the other mixed fraction and multiply numerator by numerator, and denominator by denominator, then you reduce it.

2007-05-06 11:53:16 · answer #5 · answered by cc 1 · 0 0

It is easier to first convert to proper fractions before you multiply; otherwise you could do it like this: (2+2/3)(3+4/5)=2*3+2*(4/5)+(2/3)*(3)+(2/3)(4/5)

2007-05-06 11:47:04 · answer #6 · answered by bruinfan 7 · 1 0

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