Factors and Multiples

Factors and Multiples

Factors

• Factors are numbers you multiply to get another number

• Example: the Factors for 12 are 1 x 12, 2 x 6, and 3 x 4

• Listed in order from least to greatest they are 1, 2, 3, 4, 6, 12

• 
  

• 12 has 3 factor pairs and 6 factors total.

Multiple Select

Choose ALL the factors of 8

• 1

• 2

• 3

• 4

• 8

Multiple Choice

How many factor pairs does 8 have?

• 1

• 2

• 3

Multiples

• Multiples are the result of multiplying two whole numbers, starting with the number itself.

• Example: The multiples of 3 are 3, 6, 9, 12, 15, 18 …

• You can find multiples by skip counting with the number you are given.

• OR

• Use multiplication facts (3x1 = 3, 3x2 = 6, 3x3 = 9)

Multiple Choice

Is 14 a multiple of 2?

• Yes

• No

Poll

How did you find that 14 is a multiple of 2?

• I skip counted (counted by 2s)

• I knew 14 is even and 2 always goes into even numbers

Multiple Choice

Is 6 a multiple of 6?

• Yes

• No

Is 6 a multiple of 6?

• YES!

• 6 x 1 = 6 so multiplying 6 by 1 means that I skip counted by 1 to find 6 as a multiple.

• **Reminder: Always start with 1 when finding multiples (and factors!)

Fill in the Blanks

List all the multiples of 4 (stop at 40)

All the multiples of 4 are: (stopped at 40)

• 4, 8, 12, 16, 20, 24, 28, 32, 36, 40

• You can find all these multiples by skip counting

• OR

• you could list all the multiplication facts for 4 (4x1 = 4, 4x2 = 8....and so on)

Multiple Choice

Is 14 a multiple of 4?

• Yes

• No

Is 14 a multiple of 4?

• NO

• If I skip count by 4, it would look like 4, 8, 12, 16

• So 14 is not a multiple of 4.

Multiple Choice

Is 4 a factor of 14?

• Yes

• No

Is 14 a factor of 4?

No

I can use a T chart to list all the factors of 14

Factors and Multiples are related in multiplication

Skip counting can help find multiples by starting with the given number

Skip counting can help find factors by starting with 1