Prime Time

Prime Time

Lesson 1.2

Playing to Win the Factor Game

Vocabulary

• prime number

• composite number

Materials

• Labsheet 1.2

• Large chart, like Labsheet 1.2, for display in classroom

Goals

• Classify numbers as prime or composite

• Recognize that some numbers are rich in factors, while others have few factors

• Review multiplication facts

Launch

Explore – 20 Minutes

• Complete A 1, 2, and 3.

• Complete B – H

• page 10

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Time’s Up!!!

Summarize

Summarize

B. What is the best first move? Why?

C. Which first move would make you lose your next turn? Why?

D. Other than your answer to Question C, what is the worst first move? Why?

Summarize

E. List all the first moves that allow your opponent to score only one point. These numbers are called prime numbers.

Summarize

F. Are all prime numbers good first moves? Explain. (Remember, a number is a good first move if the player choosing the number scores more points than his or her opponent.)

Summarize

G. List all the first moves that allow your opponent to score more than one point. These numbers also have a special name. They are called composite numbers.

Summarize

H. Are composite numbers good first moves? Explain.

Summarize

Assignment

• ACE – pp. 14 - 19– Problems 8, 10 – 13, 15, 16; Applications

9, 14; Connections 32 – 34; Extensions 40 – 44

Prime Time

Documents

Transcript of Prime Time