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How do you determine if a number is a prime or composite number?. For example: Is 15 a prime or composite number?. You will learn how to determine if a number is prime or composite number by using area models. Multiplication can be shown as an area model. 2. x. 3. x. =. 3. 2.

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## How do you determine if a number is a prime or composite number?

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**How do you determine if a number is a prime or composite**number? For example: Is 15 a prime or composite number?**You will learn how to determine if a number is prime or**composite number by using area models.**Multiplication can be shown as an area model.**2 x 3 x = 3 2**Not all odd numbers are prime numbers.**5 is ODD & a prime 9 is ODD & is NOT prime**A prime number has ONLY one set of factor pairs (1 and**itself). 3x3 1x9 1x5 composite prime 9: 5:**Is 15 a prime or composite number?**15: 1 x 15 3 x 5**In this lesson you have learned how to determine if a number**is prime or composite by using area models.**17**Prime or Composite? 1 x 17= 17**Look at these numbers: 10, 11, and 12**• Which ones are prime? • Which ones are composite?**What other strategies can you use to find out if a number is**prime or composite?**Can a multiple of a number be a prime number? Explain your**thinking.**16: Prime number or Composite number?**Find all the factor pairs for 13. Then decide if it is a prime or composite number.

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