# fraction add change so same denomintor

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the way we do this is to think of a number that can be divided by 2 and 3

15 June 2011

ok so with this all you have to do is change the denominators so that they are both the same

15 June 2011

the first one that comes to mind is 6 as 6/3 = 2 and 6/2 = 3

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')

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

15 June 2011

So for a general rule:

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

15 June 2011

Step 1: find a denominator that is divisible by both the original denominators

15 June 2011

step 2: divide the original denominator of each fraction into the new denominator

15 June 2011

step 3: using your answer from step 2, multiply this number by the numerator of the original fraction

15 June 2011

so all you do is add the numerators to get 5/6

15 June 2011

well you've now got 3/6 + 2/6

15 June 2011

oh so adding them together?

15 June 2011

how would you wirt the sum?

15 June 2011

ok thank - you ^^

15 June 2011

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