Adding and Subtracting Fractions

Tiffany explains how to add and subtract fractions, emphasizing the importance of finding a common denominator. She provides five examples, demonstrating both addition and subtraction of fractions with common and different denominators. The video also covers simplifying fractions and using the least common multiple to find common denominators. Tiffany concludes by directing viewers to additional resources for further learning.

What is the first step when adding or subtracting fractions?

• Multiply the fractions

• Find a common denominator

• Subtract the denominators

• Add the numerators directly

In Example 1, what is the simplified form of the fraction 6/14?

• 3/7

• 1/2

• 2/3

• 5/7

What is a common method to find a common denominator for fractions with different denominators?

• Subtract the smaller denominator from the larger

• Multiply the denominators

• Divide the larger denominator by the smaller

• Add the numerators

Tags

CCSS.7.NS.A.1C

In Example 2, what is the result of adding 3/8 and 7/10 after finding a common denominator?

• 1 and 1/4

• 1 and 1/2

• 1 and 3/40

• 1 and 1/3

Tags

CCSS.7.NS.A.1C

In Example 3, what is the result of adding 3/7 and 20/35?

• 1

• 4/5

• 2/5

• 3/5

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

When subtracting fractions, what must be true about the denominators?

• They must be prime numbers

• They must be odd numbers

• They must be even numbers

• They must be equal

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

In Example 4, what is the simplified result of subtracting 1/5 from 9/15?

• 3/5

• 1/3

• 2/5

• 1/2

What is the least common multiple of 30 and 20 used in Example 5?

• 50

• 70

• 60

• 40

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

In Example 5, what is the simplified result of subtracting 8/20 from 22/30?

• 2/3

• 1/4

• 1/2

• 1/3

Tags

CCSS.6.EE.A.1

What is the final answer for Example 5 after simplification?

• 1/5

• 1/4

• 1/3

• 1/2

Tags

CCSS.6.EE.A.1