Unit 1 EA#2 Redo "Winter Sports"

What is a composite number?

• a number with ONLY TWO factors

• a number with LESS THAN TWO factors

• a number with MORE THAN TWO factors

• a number with ONLY ONE factor

Tags

CCSS.4.OA.B.4

What are factors?

• number that are multiplied together

• prime numbers

• composite numbers

• numbers that are added together

Tags

CCSS.4.OA.B.4

A prime number is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has only two factors.
  (1 and itself)

Tags

CCSS.4.OA.B.4

Which of the following is NOT true about prime numbers? 

• They have exactly two factors 
• 1 is a factor of every prime number
• No prime numbers end in zero
• All prime numbers are odd numbers.  

Tags

CCSS.4.OA.B.4

Is 65 a prime number? Explain how you know.

Tags

CCSS.4.OA.B.4

Is the prime factorization of 100 equal to 2 ⋅ 2 ⋅ 25? Explain why or why not. (Hint: What is the definition of Prime Factorization)

Find the prime factorization of 108

• 2³ * 3²

• 2² • 3³

• 2⁵ • 3

• 2 • 3 • 7 • 11

Use a number tree to find the prime factorization of 42

• 4 x 4 x 3

• 2 x 3 x 7

• 6 x 7

• 2 x 4

Tags

CCSS.4.OA.B.4

True or False...
40,500 is divisible by 6

• True
• False

Tags

CCSS.4.OA.B.4

All of these numbers are divisible by 5 except for...

• 75,395
• 984,940
• 222,222,235
• 8,943,892

Tags

CCSS.4.OA.B.4