Prime Time 1.1 Finding Proper Factors

1
Prime Time 1.1 Finding Proper Factors

• Play the Factor Game once with a partner. Take
  turns making the first move. Look for moves that
  will give you more points than your opponent.
• Record your First Move scores in a T-Chart
• As you play, write down any strategies or
  patterns that you find.

2
Double Check

• How can you test to determine whether a number is
  a factor of another number?
• If you know one of the factors of a number, can
  you find another factor?

3
Question

• What is the term for a number that has many
  factors?

4
Composite!

• A composite number is a number that has more than
  two factors.
• What is the term for a number that has only two
  factors?

5
Prime!

• A prime number has only two factors!
• Can you think of examples of prime numbers?
• Is the number 1 prime?
• Is the number 9 prime?

6
Copy T-Charts and solve.

• Check your work with factor pairs!
• Circle all prime numbers and box composite
  numbers.

7
Homework

• On a sheet of notebook paper, draw and solve
  Factor Pair T-Charts for the following numbers
• 10, 12, 15, 28, 30, 39, 42, 48, 60, 72, 80
• Remember Include all factor pairs! Use your
  Double Check methods!

8
The Product Game!

• Think Factor Pairs
• Remember
• Factor x Factor Product