Factors and Multiples 4th Grade

Factors Day 1 SPI 0406.2.4 TLW find factors and common factors of two numbers.

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

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

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

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

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

Multiples Day 2 SPI 0406.2.4 TLW find multiples and common multiples of two numbers.

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

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 = 0 1 x 2 = 2 2 x 2 = 4 3 x 2 = 6

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

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