Significant Figures and Rounding

153.89

Round to 2 significant figures.

(a)  

How many significant figures does the following number have: 0.00204

• 6
• 4
• 3
• 2

How many significant figures does the following number have?
0.00345

• 6
• 5
• 3
• Ambiguous: 3,4,5, or 6

What is 98.907 rounded to 2 significant figures?

• 90

• 10

• 100
• 1.0x10²

Calculator says: 923 g ÷ 20312 cm³  = 0.045441119. Give the answer with the correct number of significant figures.

• 0.04 g/cm³
• 0.045 g/cm³
• 0.0454 g/cm³
• 0.05 g/cm³

Calculator says 7.897 m - 0.64 m = 7.257. Give the answer with the correct number of significant figures.

• 7.25 m

• 7.257 m

• 7.3 m

• 7.26 m

0.0015289

Round to 3 significant figures.

(a)  

Round 509.96 to 4 significant figures

• 509.9

• 509.0

• 510.0

• 510

Which of the following numbers has three significant figures?

• 1014 miles
• 101 feet
• 1000 yards
• all of the choices

How many significant figures does the following number have: 0.002040

• 6
• 4
• 3
• 2