Adding and Subtracting Fractions: Key Techniques and Methods

This video tutorial by Catherine covers adding and subtracting fractions, focusing on like and unlike fractions. It introduces the butterfly method as an alternative approach to finding common denominators. The tutorial includes examples of adding and subtracting fractions both vertically and horizontally, and provides practice problems and word problems to reinforce learning. A self-quiz is included to test understanding.

What is required to add or subtract fractions effectively?

• Fractions must be reduced first

• A common denominator

• Numerators must be prime numbers

• Different denominators

What does the term 'like fractions' refer to?

• Fractions that are equivalent

• Fractions with the same denominators

• Fractions with the same numerators

• Fractions with different denominators

How do you find the sum of 1/5 and 2/5?

• 3/10

• 3/5

• 1/10

• 2/5

What is the result of subtracting 3/5 from 4/5?

• 7/10

• 1/4

• 1/10

• 1/5

What is the butterfly method used for?

• Finding the least common multiple

• Adding and subtracting unlike fractions

• Multiplying fractions

• Reducing fractions

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

• Subtract the results

• Divide the results

• Multiply the denominators

• Add the results

How do you handle subtraction in the butterfly method?

• Subtract the wings and multiply the tail

• Add the wings and subtract the tail

• Subtract the wings and add the tail

• Subtract both the wings and the tail

What is the perimeter of a rectangle with sides 1/5 mile and 1/9 mile?

• 4/45 mile

• 2/5 mile

• 2/14 mile

• 28/45 mile

What is the perimeter of a license plate measuring 5/2 feet by 2/3 feet?

• 5 1/3 feet

• 7 1/2 feet

• 19/3 feet

• 6 1/3 feet

Which of the following is a correct answer from the self-quiz?

• 21/40

• 26/63

• 1/44

• All of the above