Edit 
Delete - Last Modified By: System at 23/05/2013 3:01:57 PM
Work through the instructions and worksheet below
Edit Delete - Last Modified By: System at 23/05/2013 3:01:57 PM
Use the link below to find questions and help on the topic
Edit Delete - Last Modified By: System at 23/05/2013 3:01:57 PM
Use Mathletics to find the relevant section
Edit Delete - Last Modified By: System at 23/05/2013 3:01:57 PM
BBC Bitesize website. The first two pages explain the task and there are then questions at the bottom of the second page