The Singing Hedgehog Guide to:
Adding Fractions 1

Adding and subtracting fractions is like dealing with smelly babies:

Sort out their bottoms!

Here is the sequence to follow:

 Write out the question
 Put down the LCM


Do the "Not thinking very much at all" line
Just write two fractions over the LCM


 Work out what has happened to the bottoms
 
 To turn 4 into 12 we times by 3

 
 To turn 6 into 12 we times by 2



 Now we just do the same to the top
 as we did to the bottom

 
times 3 by 3 to make 9

 
times 1 by 2 to make 2


 write in the top values


 add the tops

 don't add the bottoms!
(It just tells us the size of slice)


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fractions index

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