Extra Practice exercises are downloadable worksheets of additional practice exercises. Print out these worksheets, work through the exercises, then check your work against the answer page.

Once you've practiced with American and metric measures, consider their everyday uses. Refer back to the first page of Chapter 9 in your Prealgebra textbook and review the asthma inhaler application.

Here's your chance to explore the World Wide Web and practice your new skills at the same time. Explore some health and asthma related Web site to learn more about this condition and its various treatments.

After you've practiced and after you've explored, don't forget about your upcoming Chapter Test. Prepare for your exam by working through our Chapter 9 Review, and then check your answers. These free downloadable files are accessible by selecting the Chapter Review button at the top of this page.

Good luck!