OBJECTIVE 1 7.2G

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GRADE 7 MATHEMATICS (7.2) Number, operation, and quantitative reasoning. The student adds, subtracts, multiplies, or divides to solve problems and justify solutions. The student is expected to: (G) determine the reasonableness of a solution to a problem.

Sammy bought 6 different compact discs. The prices ranged from $12.80 to $19.50 per compact disc. He bought at least one at the least price and at least one at the greatest price.   List four possible total costs of the compact discs, not including tax. Your list needs to include a least possible and greatest possible total cost.

  Write a range for the total cost of the 6 discs.

1. What mathematical concepts and vocabulary do I need to know to be able to work this problem?

2. Will the Grade 7 Mathematics Formula Chart be helpful on this problem? Why or why not?

3. Will a picture or diagram be helpful on this problem? If so, how?

4. How would I decide if a given total cost for this problem was reasonable or not?

5. What problem-solving strategy or strategies will I use to help solve this problem?

6. Extension (7.2F): Choose one of your possible costs above and find an average cost per compact disc.

TEKSING TOWARD TAKS © 2006

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