Adding and Subtracting Fractions with LCM Techniques

This video tutorial teaches how to add and subtract fractions using the least common multiple (LCM). It explains the process in three steps: finding the LCM of the denominators, rewriting fractions with the LCM as the new denominator, and performing the addition or subtraction. The tutorial provides examples for both addition and subtraction, ensuring a clear understanding of the method. The video concludes with a summary and encourages viewers to like and subscribe.

What is the first step in adding fractions like 3/4 and 1/6?

• Find the LCM of the denominators

• Subtract the numerators

• Add the numerators directly

• Multiply the denominators

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the LCM of 4 and 6?

• 12

• 6

• 24

• 18

How do you adjust the fraction 3/4 to have 12 as the denominator?

• No adjustment needed

• Multiply both numerator and denominator by 3

• Multiply both numerator and denominator by 4

• Multiply both numerator and denominator by 2

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

After adjusting, what is the new form of 1/6?

• 6/12

• 1/12

• 3/12

• 2/12

Tags

CCSS.4.NF.B.4A

CCSS.4.NF.B.4B

What is the result of 3/4 + 1/6 when using a common denominator?

• 11/12

• 10/12

• 12/12

• 9/12

Tags

CCSS.7.NS.A.1C

What is the LCM of 8 and 12?

• 60

• 24

• 36

• 48

How is the fraction 5/8 adjusted to have 24 as the denominator?

• Multiply both numerator and denominator by 4

• Multiply both numerator and denominator by 2

• Multiply both numerator and denominator by 3

• No adjustment needed

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the new form of 7/12 when adjusted to have a denominator of 24?

• 14/24

• 21/24

• 28/24

• 7/24

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the result of 5/8 - 7/12 using the common denominator 24?

• 3/24

• 2/24

• 4/24

• 1/24

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Why is finding the LCM important in operations with fractions?

• It helps in division of fractions

• It simplifies the addition and subtraction process

• It is not important

• It is necessary for multiplication

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2