The Singing Hedgehog Guide to:
Multiplying Fractions 2

When multiplying mixed numbers we must first turn them into top-heavy fractions.

Once we have only fractions we just do the rule:

IT'S A CROSS SO CROSS THINGS OUT!

Here is another example:

 Write out the question

 Turn mixed into top-heavy
     1 times 4 is 4 add 3 gives 7
     2 times 7 is 14 add 4 gives 18

 Find common factors (numbers to divide by)
 
 7 and 7 are both divisible by 7 to leave 1 and 1
 
4 and 18 are both divisible by 2 to leave 2 and 9

 Multiply across
 Turn top-heavy back to mixed
 2 into nine goes 4 with 1 left over




next page
 
fractions index


return to SHG main page