Reporting Answers Correctly: Considering the Limitations of Measuring Tools

This lesson covers the importance of understanding measurement accuracy and the limitations of measuring tools. It explains how to use a ruler for measurement, emphasizing that all measurements are approximations. The lesson includes examples, such as measuring a pencil and a dime, and solving conversion problems like converting marathon distances and calculating sprint times. The key takeaway is to report answers accurately by considering the least accurate measurement.

Why is it important to choose the right measuring tool based on the required precision?

• To avoid using a tool that is too expensive

• To achieve the desired level of accuracy

• To ensure the measurement is exact

• To make the measurement process faster

What is a common mistake students make when taking measurements?

• Measuring in both inches and centimeters

• Assuming measurements are exact

• Ignoring the last digit of a measurement

• Using a ruler for all measurements

Which unit is most accurate for measuring height with a typical ruler?

• Feet

• Yards

• Millimeters

• Centimeters

Why can 2.1 centimeters be considered a reasonable measurement for the diameter of a dime?

• It is the exact diameter of a dime

• It is within the limitations of a typical ruler

• It is a common measurement for coins

• It is more accurate than millimeters

How many inches are in 26.2 miles if there are 63,360 inches in a mile?

• 1,663,200 inches

• 1,660,032 inches

• 1,660,000 inches

• 1,662,000 inches

What is the significance of the zero in the measurement 4.60 seconds?

• It indicates a rounding error

• It is not significant

• It shows the measurement is to the hundredth of a second

• It is used for decoration

How should you report the total practice time if Justin runs 2000 sprints at 4.60 seconds each?

• 153.3 minutes

• 154 minutes

• 152 minutes

• 153 minutes