Calculating Discounts and Percentages

The video tutorial teaches how to calculate the cost of an item after a discount using a double number line. It explains the concept of discounts as a percentage reduction from the original price and demonstrates how to use a double number line to visualize percents and decimals. Through an example of buying a television, the tutorial shows how to calculate the discounted price using both numeric and algebraic expressions. The lesson concludes with a review of the key concepts and methods for calculating discounts.

What does a discount do to the original price of an item?

• Doubles the original price

• Increases the original price

• Decreases the original price

• Keeps the original price the same

How is 15% represented on a double number line?

• As 0.15

• As 1.5

• As 15

• As 0.015

If a television costs $300 and the discount is 15%, what is the discounted price?

• $300

• $270

• $255

• $285

What is the first step in writing a numeric expression for a discount?

• Divide the original price by the discount percentage

• Multiply the original price by the discount percentage

• Add the discount to the original price

• Subtract the discount from the original price

How can you express 85% of a price using decimals?

• 0.085

• 8.5

• 0.85

• 85

What is the algebraic expression for a 15% discount on an unknown price x?

• 1x - 0.15x

• 1x / 0.15x

• 1x * 0.15x

• 1x + 0.15x

If the discount is 20%, how is it represented in decimal form?

• 0.02

• 0.20

• 20

• 2.0

What is the final step in calculating the price after a discount using an algebraic expression?

• Subtract the discount from the original price

• Multiply the original price by the remaining percentage

• Divide the original price by the discount percentage

• Add the discount to the original price

What is the purpose of using a double number line in this lesson?

• To visualize percentages and decimals

• To compare two different items

• To calculate the total cost of multiple items

• To determine the original price of an item

What is the key takeaway from this lesson on discounts?

• Learning how to ignore discounts

• Learning how to increase prices

• Understanding how to calculate discounts using expressions

• Understanding how to double the price of an item