Adding and Subtracting Fractions

This video tutorial covers the topic of adding and subtracting fractions using the Least Common Multiple (LCM). It begins with an introduction and preparation instructions, followed by a detailed explanation of the steps involved in using LCM for fraction operations. The tutorial includes an example of adding fractions and provides practice problems for students to solve on their own. Key concepts such as identifying the LCM, rewriting fractions, and simplifying answers are emphasized throughout the lesson.

What does LCM stand for in the context of fractions?

• Largest Common Multiple

• Lowest Common Measure

• Least Common Multiple

• Largest Common Measure

What is the first step in adding fractions with different denominators?

• Multiply the fractions

• Add the numerators

• Find the LCM of the denominators

• Subtract the denominators

When rewriting fractions using the LCM, what must be changed?

• Both numerator and denominator

• Only the numerator

• Neither

• Only the denominator

In the example, what is the LCM of 5 and 2?

• 20

• 5

• 10

• 15

What is the result of adding 3/5 and 1/2 after finding a common denominator?

• 11/10

• 1 and 1/5

• 9/10

• 1 and 1/10

In the practice problem, what is the LCM of 9 and 6?

• 24

• 12

• 18

• 36

What is the result of subtracting 1/6 from 4/9?

• 7/18

• 3/18

• 5/18

• 1/18

When adding mixed numbers, when should you consider the whole numbers?

• While finding the LCM

• Before finding the LCM

• After adding the fractions

• Never

What is the simplified form of 8/6?

• 4/3

• 1 and 2/3

• 1 and 1/3

• 2/3

In the final practice problem, what is the result of subtracting 2 and 4/9 from 3 and 1/3?

• 1 and 2/9

• 7/9

• 1 and 1/9

• 5/9