Rounding Numbers

Determine the number of significant figures of the measurement:

 $13800\ grams$  

• 6

• 5

• 4

• 3

Determine the number of significant figures of the measurement:

 $0.10034\ dm$  

• 6

• 5

• 4

• 3

Determine the number of significant figures of the measurement:

 $0.004508\ m$  

• 7

• 6

• 5

• 4

Determine the number of significant figures of the measurement:

 $0.00456\ cm.$  

• 6

• 5

• 4

• 3

FInd the value of

 $\sqrt{7}$  , giving your answer to 4 significant figures.

•  $2.645$  

•  $2.646$  

•  $2.6458$  

•  $2.6457$  

Find the value of  $\frac{\sqrt{2}+1}{3}$  
giving your answer correct to 3 significant figures.

•  $0.804$  

•  $0.805$  

•  $0.80$  

•  $0.81$  

Find the value of  $\frac{6+\sqrt{6^2-4\times2\times1}}{2}$  
giving your answer correct to 3 significant figures.

•  $5.645$  

•  $5.646$  

•  $5.65$  

•  $5.64$  

Round of the measurement  $0.203478\ cm$  to 3 significant figures.

•  $0.203\ cm$  

•  $0.204\ cm$  

•  $0.20\ cm$  

•  $0.2035\ cm$  

Round of the measurement  $4.0356\ cm$  
 to 3 significant figures.

•  $4.035\ cm$  

•  $4.036\ cm$  

•  $4.03\ cm$  

•  $4.04\ cm$  

Round off the measurement  $2.3957\ cm$  to 3 significant figures.

•  $2.30\ cm$  

•  $2.40\ cm$  

•  $2.4\ cm$  

•  $2.39\ cm$