The Singing Hedgehog Guide to:

Adding Fractions 1

next page

fractions index

return to SHG main page

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)

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)

fractions index

return to SHG main page