fraction add change so same denomintor

fractions changing denominators to be the same example1/3+1/2=

Answers
the way we do this is to think of a number that can be divided by 2 and 3
chloe
15 June 2011
ok so with this all you have to do is change the denominators so that they are both the same
chloe
15 June 2011
the first one that comes to mind is 6 as 6/3 = 2 and 6/2 = 3
chloe
15 June 2011
so now we know that we have to convert 1/3 into x/6 and 1/2 into x/6 (x in this case just means 'something')
chloe
15 June 2011
Ok so for 1/3 we know that 3 goes into 6, 2 times so all we now have to do is to multiply the top number (the numerator) by 2 so 1/3 becomes 2/6
chloe
15 June 2011
So for a general rule:
chloe
15 June 2011
So for the 1/2 we know that 2 goes into 6, 3 times so all we have to do is multiply the numerator by 3 to get 3/6
chloe
15 June 2011
Step 1: find a denominator that is divisible by both the original denominators
chloe
15 June 2011
step 2: divide the original denominator of each fraction into the new denominator
chloe
15 June 2011
step 3: using your answer from step 2, multiply this number by the numerator of the original fraction
chloe
15 June 2011
so all you do is add the numerators to get 5/6
chloe
15 June 2011
well you've now got 3/6 + 2/6
chloe
15 June 2011
oh so adding them together?
chloe
15 June 2011
how would you wirt the sum?
greengirl
15 June 2011
ok thank - you ^^
greengirl
15 June 2011
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