Calculating Fuel Efficiency and Rates

This video tutorial explains the importance of using exact values in calculations to minimize errors, especially when rounding. It presents a problem involving a car's fuel efficiency and demonstrates how to calculate the distance a car can travel on a given amount of fuel and how much fuel is needed for a specific distance. The tutorial emphasizes avoiding early rounding to reduce errors and provides step-by-step solutions using exact rates.

Why is it important to use exact values for calculations before rounding?

• To make calculations easier

• To reduce the error in the final result

• To save time during calculations

• To avoid using a calculator

What is the first question we need to solve regarding the car's mileage?

• How many miles can the car drive on 28 gallons?

• How many gallons are needed to drive 465 miles?

• How far can the car drive on 41 gallons?

• What is the car's fuel efficiency?

What is a common mistake when calculating rates?

• Using exact rates for calculations

• Rounding unit rates before using them

• Calculating rates without a calculator

• Ignoring the units of measurement

How do you express the rate of 465 miles per 28 gallons?

• 28 gallons per 465 miles

• 465 miles per 28 gallons

• 465 gallons per 28 miles

• 28 miles per 465 gallons

What is the correct way to calculate the distance the car can drive on 41 gallons?

• Add 41 to the unit rate

• Divide 41 by the unit rate

• Use the exact rate of 465 miles per 28 gallons

• Multiply 41 by the rounded unit rate

What is the error in using the rounded unit rate of 17 miles per gallon for calculations?

• It is the recommended method

• It introduces more error

• It simplifies the calculation

• It gives a more accurate result

How many gallons are needed to drive 1,540 miles using the exact rate?

• 154 gallons

• 100 gallons

• 92.7 gallons

• 200 gallons

What is the incorrect estimate of gallons needed to drive 1,540 miles using the rounded rate?

• 92.7 gallons

• 200 gallons

• 154 gallons

• 100 gallons

Why should we avoid using the rounded rate of 0.1 gallons per mile?

• It is more complex

• It results in a larger error

• It is less efficient

• It is not a standard method

What is the correct estimate of gallons needed for 1,540 miles using the exact rate?

• 200 gallons

• 100 gallons

• 154 gallons

• 92.7 gallons