Adding and Subtracting Fractions: The Butterfly Method and More

This video tutorial covers the addition and subtraction of fractions. It begins with a review of adding fractions with the same denominators, emphasizing that denominators should not be added. The tutorial then explains how to add fractions with different denominators using the least common multiple (LCM) and introduces the butterfly method as an alternative approach. The video also covers subtracting fractions, both with the same and different denominators, and concludes with practice questions to reinforce learning.

What is the result of adding 1/2 and 1/2?

• 1/4

• 2

• 2/4

• 1

When adding fractions with different denominators, what is the first step?

• Multiply the denominators

• Find the LCM of the denominators

• Subtract the numerators

• Add the numerators

What is the LCM of 2 and 3?

• 3

• 2

• 6

• 5

What is the butterfly method used for?

• Dividing fractions

• Finding the LCM

• Multiplying fractions

• Adding or subtracting fractions

In the butterfly method, what do you do after multiplying the numerators?

• Subtract the results of the cross multiplications

• Add the results of the cross multiplications

• Multiply the denominators

• Add the denominators

How do you subtract fractions with the same denominators?

• Subtract the numerators

• Subtract the denominators

• Add the numerators

• Add the denominators

What is a negative fraction?

• A fraction with both negative numerator and denominator

• A fraction on the negative side of the number line

• A fraction with a negative denominator

• A fraction with a negative numerator