Calculating Sales Tax and Decimals

Aubrey Basset presents a mini lesson on calculating sales tax for seventh-grade math. The lesson covers objectives, decimal operations, converting percentages to decimals, and calculating sales tax. It also includes estimation techniques for quick calculations. The video emphasizes the importance of understanding sales tax to avoid surprises at the register.

Why is it important to calculate sales tax before making a purchase?

• To increase the total purchase price

• To reduce the amount of tax paid

• To avoid overspending at the register

• To get a discount on the purchase

What is the first step in decimal multiplication?

• Line up the decimals

• Convert decimals to fractions

• Ignore the decimals and multiply

• Add zeros as placeholders

When adding decimals, what is the most important rule to follow?

• Multiply the decimals first

• Convert decimals to percentages

• Line up the decimals

• Ignore the decimals

How do you convert a percentage to a decimal?

• Multiply by 100

• Divide by 100

• Add 100

• Subtract 100

What is the decimal equivalent of a 8.25% tax rate?

• 82.5

• 0.0825

• 8.25

• 0.825

What is the first step in calculating sales tax on a purchase?

• Add the tax to the purchase price

• Round the tax rate

• Find the subtotal of the purchase

• Estimate the total cost

Why might you choose to estimate sales tax instead of calculating it exactly?

• To confuse the cashier

• To pay less tax

• To save time at the register

• To avoid using decimals

What is a quick way to estimate sales tax if the tax rate is 8.25%?

• Use 15% as the tax rate

• Use 10% as the tax rate

• Use 20% as the tax rate

• Use 5% as the tax rate

What should you do after calculating the sales tax to find the total amount to pay?

• Divide the tax by the subtotal

• Add the tax to the subtotal

• Multiply the tax by the subtotal

• Subtract the tax from the subtotal