Mastering LCM and GCF through Prime Factorization

What is the purpose of using prime factorization in mathematics?

• To calculate the square root of a number

• To determine if a number is even or odd

• To find the GCF and LCM of two whole numbers

• To find the sum of two numbers

Which of the following is a prime number?

• 4

• 9

• 6

• 7

Tags

CCSS.4.OA.B.4

What is the prime factorization of 40?

• 2 x 2 x 2 x 5

• 2 x 4 x 5

• 2 x 2 x 10

• 4 x 10

What is a common misunderstanding when finding factors?

• Confusing factors with products

• Confusing factors with multiples

• Confusing factors with sums

• Confusing factors with differences

Tags

CCSS.4.OA.B.4

What is the prime factorization of 8?

• 4 x 2

• 2 x 2 x 4

• 2 x 4

• 2 x 2 x 2

What is the prime factorization of 30?

• 2 x 3 x 5

• 3 x 10

• 2 x 15

• 5 x 6

In a Venn diagram, where do the shared prime factors go?

• Outside the circles

• In the center

• In the right circle

• In the left circle

Tags

CCSS.4.OA.B.4

What is the GCF of 8 and 30?

• 2

• 4

• 6

• 8

What is the LCM of 8 and 30?

• 150

• 120

• 90

• 60

What is the GCF of 18 and 27?

• 3

• 12

• 6

• 9