Edit 
Delete - Last Modified By: dna at 12/05/2014 9:06:54 AM
Try this Discovery Card from Oxford Big Ideas 8
Edit Delete - Last Modified By: dna at 12/05/2014 9:50:57 AM
A worksheet with answers. so that you can correct your work.
Edit Delete - Last Modified By: dna at 12/05/2014 2:40:00 PM
The following worksheet is from Mathletics. It includes examples and explanations. The solutions are in the link that follows on. You will have to scroll through the solution book to find the appropriate section.
Edit Delete - Last Modified By: dna at 12/05/2014 2:40:38 PM
Edit Delete - Last Modified By: dna at 12/05/2014 2:54:18 PM
A text book exercise from Oxford Big Ideas 8. Includes answers (for checking).
Edit Delete - Last Modified By: ili at 13/05/2014 11:40:24 AM
Try the following exercises for extra practice.
Edit Delete - Last Modified By: ili at 13/05/2014 11:42:46 AM
Check your answers