Understanding LCM through Factor Trees

This video tutorial from MooMooMath and Science explains how to find the lowest common multiple (LCM) of 16 and 12 using a factor tree method. The instructor demonstrates the prime factorization of both numbers, organizes the prime factors in a chart, and calculates the LCM by multiplying the necessary prime factors. The video concludes with a reminder about the importance of kindness.

What is the purpose of using a factor tree in finding the LCM?

• To find the greatest common divisor

• To break down numbers into their prime factors

• To add numbers together

• To multiply numbers directly

Tags

CCSS.4.OA.B.4

Which of the following is a prime factor of 16?

• 7

• 2

• 5

• 3

How many times does the number 2 appear in the prime factorization of 16?

• Once

• Three times

• Twice

• Four times

What is the prime factorization of 12?

• 2 x 3 x 3

• 2 x 2 x 3

• 3 x 3 x 3

• 2 x 2 x 2

Why is it important to organize prime factors in a chart?

• To find the greatest common factor

• To make multiplication easier

• To simplify addition

• To ensure all factors are used

What rule is applied when selecting numbers from the chart for LCM calculation?

• Select numbers randomly

• Select one number per column

• Select all numbers

• Select the smallest number

Tags

CCSS.6.EE.A.1

What is the result of multiplying 2 x 2 x 2 x 2?

• 8

• 24

• 12

• 16

What is the final step in finding the LCM of 16 and 12?

• Multiplying the selected prime factors

• Dividing the numbers

• Adding all numbers

• Subtracting the numbers

What is the LCM of 16 and 12?

• 60

• 48

• 36

• 24

What is the key takeaway from the lesson on LCM?

• Prime numbers are not important

• Always use addition

• Kindness multiplies kindness

• LCM is the same as GCD