Multiplying fractions
· Simple fractions
1. Multiply Top line
2. Multiply bottom line.
3. Top line over bottom line
4. Simplify if you can.
Examples
If you spot that you can simplify first:-
1. Simplify
2. Multiply Top line S M M S
3. Multiply bottom line.
4. Simplify again if necessary.
Examples
· Multiplying Mixed number fractions
1. Change from a mixed number to an improper fraction.
2. Simplify
3. Multiply Top line
4. Multiply bottom line. S M M S
5. Simplify again if necessary.
6. Convert back to mixed number if necessary.
Examples
The inverse of a number is that number turned upside down.
The inverse has symbol .
To divide a fraction, multiply it by its inverse.
1. Turn the fraction to the right of the ÷ sign upside down
2. Change the ÷ sign to a x.
3. Multiply the fraction as normal.
Examples
So
It
also works nicely with algebraic fractions: -