[G7 IS1] Significant Figures Drills

Which of the following is/are TRUE about the rules of significant figures?

• Interior zeros are significant.

• Leading zeros are always NOT significant.

• Trailing zeros are always NOT significant.

• Exact numbers have an unlimited number of significant figures.

• All non-zero digits are always significant.

When adding measurements with significant figures, the result has the same number of decimal places as the measurement with the lowest number of decimal places.

• True
• False

When subtracting measurements with significant figures, the result has the same number of significant figures as the measurement with the lowest number of significant figures.

• True
• False

Determine the significant figures for each measurement:
a) 0.003402 nm = ​​ (a)  
b) 500.20 kg = ​​ (b)  
c) 4.080 x 10³ s = ​​ (c)  

• 4
• 5
• 6
• 7
• 8
• 3
• 2
• 1
• 0

How many significant figures do the following numbers have?

a) 956 = ​ (a)  

b) 2.1390 = ​ (b)  

c) 0.0000620 = ​ (c)  

d) 0.40001 = ​ (d)  

• 3
• 5
• 0
• 1
• 2
• 4
• 6
• 7
• 8

Which of the following values has/have at least 3 significant figures?

• 100.3

• 1.008

• 0.00340

• 0.00001

• 1.0000

Which of the following has/have infinite significant figures?

• 2 dozen

• 60 s = 1 min

• Total population in your barangay

• Your mass in a triple beam balance

• Volume of water in a graduated cylinder

Which of the following values has/have exactly 3 significant figures?

• 3 pillows

• 143 glasses of water

• 0.00716 g

• 900. 900. mL

• 3 x 10² mi

Express 15.453 to three significant figures.

• 15.4

• 15.5

• 16.0

• 15.0

Express 2.35 to two significant figures.

• 2.4

• 2.3

• 2.0

• 2.00