Exploring Tax Calculations with Desmos

This video tutorial covers real-life math problems involving tax, tip, discount, and total calculations. It explains how to identify one-step and two-step problems using keywords and provides practice problems to apply these concepts. The tutorial uses Desmos for calculations and emphasizes the importance of rounding and understanding percentages in financial contexts.

What type of problem involves finding the total amount after applying a discount?

• One-step problem

• Two-step problem

• Three-step problem

• No-step problem

Which of the following is a keyword indicating a one-step problem?

• Sale price

• Final bill

• Discount amount

• Total cost

If a TV costs $599 and is on sale for 35% off, what is the discount amount?

• $205.35

• $209.65

• $199.50

• $215.00

You have a 15% off coupon for a bill of $123.76. What is the final sale price?

• $105.20

• $110.00

• $120.00

• $115.00

What is the first step in solving a two-step problem involving a discount?

• Find the percentage of the original amount

• Subtract the discount from the original amount

• Add the discount to the original amount

• Multiply the original amount by the discount rate

Which of the following is NOT a keyword indicating a two-step problem?

• Total bill

• Sale price

• Discount amount

• Final cost

Yasmine buys a DVD for $20 with an 8% tax. How much tax does she pay?

• $1.50

• $2.00

• $1.80

• $1.60

Joe tips 20% on a $13.85 bill at Starbucks. How much is the tip?

• $2.50

• $2.77

• $3.00

• $2.90

Ayanna buys a dress for $39.98 with a 7% tax. What is the total amount she pays?

• $42.00

• $43.00

• $42.50

• $42.78

If an item costs $50 and there is a 10% tax, what is the total cost including tax?

• $52.00

• $55.00

• $51.00

• $50.50