Mixture Problems

Alphonso Kennedy               Lindblom Tech. H. S.
                               6130 S Wolcott Ave.
                               Chicago, Ill. 60636
                               312-471-8700     

Objective:

Ninth grade students will be able to write the equation and solve mixture 
problems. 

Equipment and Materials:

1. Overhead Projector
2. 100 red and 100 yellow beads for each group of 4 students
3. 1 container for each group
4. 1 calculator for each group
5. 5 small cups for each group

Recommended Strategies:

1. Students will count out 4 cups of beads that are 40% red (a cup contains 15 
   beads) and place the beads in a container.
2. Students will count out 2 cups of beads that are 80% red and add this 
   mixture to the container until the beads in the container are 50% red.
3. Students will complete the following table.

Original Mixture                   Add                    New Mixture
(Percent)(Amount)            (Percent)(Amount)         (percent)(Amount)
________________              _______________    =      _______________
                                                        
4. Students will solve the next two problems by repeating the steps above.
   a. Change 8 cups of beads that are 50% red to 60% red by adding 100% red 
      beads.
   b. Change 4 cups that are 20% red to 15% red by adding yellow beads.
5. Student will solve additional problems by letting x = amount added.