Prime and Composite Numbers

Prime & Composite Numners Numbers

Prime and Composite Song

by Math with Mr. T

Poll

We learned about prime numbers earlier this year.  How do feel about your knowledge of prime numbers?

• Right now, I don't really understand prime numbers.

• I feel like am starting to understand prime numbers, but I need more time and practice.

• I feel pretty good about prime numbers, but more time and practice couldn't hurt, right?

• I totes got this!

What are prime numbers?

• Prime numbers are whole numbers.

• They have only 1 pair of factors.

• 
  The factor pairs are the number 1, and itself.

Open Ended

What do you know about prime numbers?

Multiple Select

Choose all choices that are correct.

• Prime numbers are fractions and decials.

• Prime numbers have only 1 factor pair.

• Prime numbers only have 2 factors, 1 and the number itself.

• Prime numbers are whole number.

Multiple Select

Look at the images and select the numbers that are prime.

Multiple Choice

29 is prime because

• it only has one factor pair (1x29).

• because it is an odd number.

• my fish ate my homework.

Multiple Choice

32 is NOT prime because

• it is a two digit number.

• it has more than 1 factor pair (1x32, 2x16, 4x8)

• my dog ate my homework.

Multiple Choice

15 is NOT Prime because

• it is an odd number, and all numbers are prime numbers.

• It has more than 1 factor pair (1x15 and 3x5)

• my hamster ate my homework.

Open Ended

Why is 13 prime?

What are composite numbers?

• Composite numbers are whole numbers.

• Composite numbers have two or more factor pairs.

Open Ended

What do you know about composite numbers?

Multiple Select

Look at the images and select the numbers that are composite.

Multiple Select

How many factor pairs are there for 27?

• 1

• 2

• 3

• 4

Open Ended

27 is a composite number because it has two factor pairs. What are they?

Multiple Select

Look at the arrays and select the numbers that are composite.

Multiple Choice

Which number is prime? HINT: draw arrays OR list factor pairs to help you.

• 3

• 4

• 6

• 8

Multiple Choice

Which number is prime? HINT: draw arrays OR list factor pairs to help you.

• 6

• 7

• 8

• 9

Multiple Choice

Which number is prime? HINT: draw arrays OR list factor pairs to help you.

• 12

• 13

• 14

• 15

Multiple Choice

Which number is composite? HINT: draw arrays OR list factor pairs to help you.

• 17

• 19

• 11

• 15

Multiple Select

Which number is composite? HINT: dray arrays or list factor pairs to help you.

• 10

• 11

• 13

• 17

Multiple Select

Which number is composite? HINT: dray arrays or list factor pairs to help you.

• 23

• 24

• 29

• 31

Poll

How do you feel about prime and composite numbers now?

• Right now, I don't really understand prime numbers.

• I feel like am starting to understand prime numbers, but I need more time and practice.

• I feel pretty good about prime numbers, but more time and practice couldn't hurt, right?

• I totes got this!