Lesson 8

Multiply Two Fractions

Est. Class Sessions: 2

Summarizing the Lesson

Present students with the following problem:

Josh ate 1/10 of a candy bar and left 9/10 of it. If Sam ate 2/3 of what is left of the candy bar, how much of a whole candy bar did he eat?

Ask:

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  • Did Josh leave a lot or a little of the candy bar? How do you know? (He left a lot. 9/10 is close to the whole candy bar.)
  • How big do you think the answer will be? Why? (The answer will be pretty close to 2/3 because 9/10 is close to 1. The product will be close to 1 × 2/3.)

Ask students to first draw a picture that represents the problem. Next ask them to solve the problem. Finally, select volunteers to demonstrate their solution strategies. See Figure 12 for possible solution strategies.

Student Guide:
Student Activity Book:
Master:
Possible solution strategies for 2/3 × 9/10 = 18/30 = 6/10 = 3/5 of a candy bar
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