Adding and Subtracting Fractions

The video tutorial explains how to find the least common multiple (LCM) and its role in adding and subtracting fractions. It provides examples of using LCM to perform operations on fractions, demonstrating the process of finding equivalent fractions and simplifying results. The tutorial emphasizes the importance of LCM in ensuring fractions have a common denominator for accurate calculations.

What is the least common multiple (LCM) also known as?

• Least common denominator

• Greatest common factor

• Smallest common factor

• Highest common divisor

In the example of three-sixths minus one-fourth, what is the LCM of the denominators?

• Four

• Twelve

• Eight

• Six

After finding the LCM, what is the next step in subtracting fractions?

• Add the fractions

• Find equivalent fractions

• Multiply the fractions

• Divide the fractions

In the example of two-fourths plus one-fifth, what is the LCM of the denominators?

• Twenty

• Fifteen

• Ten

• Five

What is the result of adding two-fourths and one-fifth after finding equivalent fractions?

• Ten-twentieths

• Sixteen-twentieths

• Twelve-twentieths

• Fourteen-twentieths

In the example of five-sixths minus one-third, what is the LCM of the denominators?

• Three

• Twelve

• Nine

• Six

What is the result of subtracting five-sixths and one-third after finding equivalent fractions?

• One-sixth

• Four-sixths

• Two-sixths

• Three-sixths

What is the first step in adding or subtracting fractions?

• Multiply the fractions

• Divide the fractions

• Find the least common multiple

• Simplify the fractions

What should you do after finding equivalent fractions in the process of adding or subtracting fractions?

• Multiply the fractions

• Perform the addition or subtraction

• Find the LCM again

• Simplify the fractions