1. Factors and Multiples
4th Grade

2. Factors
Day 1
SPI TLW find factors and common factors of two numbers.

3. Definition Product Product – An answer to a multiplication problem.
7 x 8 = 56
Product

4. Definition
Factor – a number that is multiplied by another to give a product.
7 x 8 = 56
Factors

5. What are the factors?
6 x 7 = 42
6 & 7
7 x 9 = 63
7 & 9
8 x 6 = 48
8 & 6
4 & 9
4 x 9 = 36

6. How to find the factors…
Create a T-Chart
Insert the numbers
you are factoring
Write your facts for those
numbers starting with 1x __
Stop once you get to the fact that is the commutative property rule 45 99
1 X 45
3 X 15
5 X 9
1 X 99
3 X 33
9 X 11

7. How to find the greatest common factor (GCF)…
Circle the common factors
1, 3, 9
Identify what factor
is the greatest of those
that are circled.
9 is the GCF 45 99
1 X 45
3 X 15
5 X 9
1 X 99
3 X 33
9 X 11

8. Multiples
Day 2
SPI TLW find multiples and common multiples of two numbers.

9. Definition
Multiple – The product of a number and a whole number.
7 x 8 = 56
Multiple

10. Multiples…
To find the multiple of a number multiply the number by 0, 1, 2, 3, and so on.
The first four multiples of 2 are:
0 x 2 = x 2 = x 2 = x 2 = 6

11. How to find the multiples…
Create a T-Chart
Insert the numbers
you are finding the
multiples of
Skip count 5 times 2 6 2 4 6 8 10 6 12 18 24 30

12. How to find the least common multiple (LCM)…
Circle the common multiples
Identify the multiple
that is the least
LCM: 6 2 6 2 4 6 8 10 6 12 18 24 30