Adding and Subtracting Fractions with the Butterfly Method

In this video, Tanya, an engineer, teaches a fail-proof method to add and subtract fractions using the butterfly method. She explains how to handle fractions with common denominators and factors, and provides tips for simplifying fractions. The video includes examples and a recap to reinforce learning, ensuring viewers can confidently add and subtract fractions.

What is the first step in the butterfly method for adding fractions?

• Multiply the denominators

• Add the numerators

• Draw bubbles around the fractions

• Subtract the numerators

Tags

CCSS.7.NS.A.1C

In the butterfly method, what do you do after multiplying the numbers inside the bubbles?

• Divide the results to get the new numerator

• Multiply the results to get the new numerator

• Subtract the results to get the new numerator

• Add the results to get the new numerator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the result of adding 3/4 and 1/5 using the butterfly method?

• 4/15

• 19/20

• 20/19

• 15/4

Tags

CCSS.7.NS.A.1C

When adding fractions with the same denominator, what should you do?

• Add the numerators and keep the denominator the same

• Multiply the denominators

• Subtract the numerators

• Divide the denominators

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

If one denominator is a factor of the other, what is the first step?

• Find how many times the smaller denominator fits into the larger one

• Multiply the denominators

• Add the numerators

• Subtract the numerators

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the result of adding 3/5 and 1/5?

• 5/5

• 4/5

• 1/5

• 3/5

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the result of adding 3/4 and 1/8?

• 6/8

• 4/8

• 7/8

• 5/8

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the main difference when subtracting fractions compared to adding them?

• You multiply the numerators

• You subtract the numerators

• You divide the denominators

• You add the denominators

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the result of subtracting 1/5 from 3/4 using the butterfly method?

• 11/20

• 15/4

• 4/15

• 20/11

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the result of subtracting 1/5 from 3/5?

• 1/5

• 3/5

• 4/5

• 2/5

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D