Understanding Significant Figures

What is the rule for rounding a number when the digit after the last significant figure is 5 or more?

• Round down the last significant figure.

• Leave the last significant figure unchanged.

• Remove the last significant figure.

• Round up the last significant figure.

When rounding 627 to one significant figure, what is the result?

• 700

• 600

• 650

• 620

How do you round 908 to two significant figures?

• 910

• 900

• 920

• 905

What happens when you round 3750 to three significant figures?

• 3760

• 3700

• 3750

• 3740

What is the result of rounding 3750 to two significant figures?

• 3700

• 3800

• 3760

• 3750

What is the result of rounding 206.038 to four significant figures?

• 206.03

• 206.0

• 206.038

• 206.04

When rounding 0.00067 to one significant figure, what is the result?

• 0.00067

• 0.00068

• 0.0006

• 0.0007

How do you round 0.000670 to three significant figures?

• 0.000670

• 0.00066

• 0.00067

• 0.00068

What is the first significant figure in the number 0.000670?

• 0

• 6

• 7

• None of the above

What is the purpose of the challenge question at the end of the tutorial?

• To summarize the tutorial

• To review the rules of rounding

• To practice rounding to 10 significant figures

• To test your knowledge of decimals