Finding GCF and LCM: Key Concepts and Applications

In this video, Todd from the Land of Math explains the concepts of factors and multiples, focusing on the differences between them. He demonstrates how to find the greatest common factor (GCF) and the least common multiple (LCM) with examples. The video also covers how these concepts can be applied to simplify fractions and solve math problems. Todd concludes by encouraging viewers to subscribe and follow on social media.

What are the three main topics covered in the video?

• Factors, Multiples, and Prime Numbers

• Multiples, Prime Numbers, and LCM

• Multiples, GCF, and LCM

• Factors, GCF, and Prime Numbers

Tags

CCSS.4.OA.B.4

Which of the following is a factor of 12?

• 5

• 7

• 9

• 6

Tags

CCSS.4.OA.B.4

What is unique about the number 19 in terms of its factors?

• It is a prime number

• It has more than two factors

• It has only one factor

• It is a composite number

Tags

CCSS.4.OA.B.4

Which of the following is a multiple of 10?

• 35

• 30

• 25

• 15

Tags

CCSS.4.OA.B.4

How do you find the multiples of a number?

• By multiplying the number by 1, 2, 3, etc.

• By adding the number to itself repeatedly

• By dividing the number by 2

• By subtracting the number from itself

What is the greatest common factor (GCF) of 8 and 12?

• 8

• 4

• 2

• 6

Which of the following pairs has a GCF of 2?

• 6 and 12

• 8 and 16

• 14 and 28

• 10 and 20

What is the least common multiple (LCM) of 6 and 8?

• 24

• 30

• 18

• 12

Which of the following is the least common multiple (LCM) of 4 and 5?

• 20

• 10

• 25

• 15

How can the greatest common factor (GCF) be used in simplifying fractions?

• By multiplying both the numerator and denominator by the GCF

• By adding the GCF to the numerator and denominator

• By subtracting the GCF from the numerator and denominator

• By dividing both the numerator and denominator by the GCF