How to Round Numbers to Significant Figures #20

The video tutorial explains how to round numbers to a specific number of significant figures. It begins with a recap of what significant figures are, using examples to illustrate the concept. The tutorial then demonstrates how to identify significant figures in both whole numbers and decimals. It provides step-by-step instructions on rounding numbers to a given number of significant figures, including handling decimals. The video also addresses the ambiguity that can arise with significant figures, particularly in numbers like 4300, where it's unclear if zeros are significant. The tutorial aims to clarify these concepts for better understanding.

What is the first significant figure in the number 0.004031?

• 4

• 1

• 0

• 3

When rounding the number 3476 to two significant figures, which digit is considered the 'decider'?

• 7

• 6

• 4

• 3

If the 'decider' digit is 5 or more, what should you do with the last significant figure?

• Round it down

• Ignore it

• Keep it the same

• Round it up

How would you round 0.004031 to three significant figures?

• 0.004031

• 0.0040

• 0.00403

• 0.004

Why is it difficult to determine the number of significant figures in the number 4300?

• Because it is a rounded number

• Because it has zeros at the end

• Because it could have been rounded or not

• Because it is an even number