Adding and Subtracting Fractions

The video tutorial covers lesson 6.5 on adding and subtracting fractions with unlike denominators. It begins with an essential question and proceeds with multiple examples demonstrating how to find common denominators, perform addition and subtraction, and simplify results. The lesson includes word problems to apply these skills in real-world contexts. The video concludes with instructions for self-assessment.

What is the main focus of lesson 6.5?

• Dividing fractions

• Adding and subtracting fractions with unlike denominators

• Multiplying fractions

• Converting fractions to decimals

Why is it important to have a common denominator when subtracting fractions?

• To make the fractions larger

• To simplify the fractions

• To ensure the fractions can be subtracted directly

• To convert fractions to decimals

In the first example, what was the least common denominator found for 1/12 and 1/7?

• 28

• 14

• 12

• 24

What is the simplified form of 2/10?

• 1/2

• 1/5

• 2/5

• 1/10

In the second example, what is the common denominator for 7/10 and 1/2?

• 20

• 15

• 10

• 5

What is the result of subtracting 7/10 - 1/2 after finding a common denominator?

• 2/10

• 1/5

• 3/10

• 1/10

In the third example, what is the common denominator for 5/8 and 2/5?

• 20

• 30

• 40

• 50

What is the sum of 25/40 and 16/40?

• 41/40

• 42/40

• 39/40

• 40/40

How is the improper fraction 41/40 expressed as a mixed number?

• 1 and 2/40

• 1 and 1/40

• 1 and 3/40

• 1 and 4/40

In the fourth example, what is the least common denominator for 3/4 and 2/5?

• 30

• 25

• 20

• 15