Significant Figures

What is 78.5 rounded to one significant figure?

• 79

• 78.5

• 70

• 80

Round 0.010229 to four significant figures

• 1022

• 1023

• 0.01023

• 0.01022

What is 7.555 rounded to two significant figures?

• 7.6

• 7.5

• 70

• 76

• 7.60

Round 52689 to 3 significant figures.

• 526
• 527
• 52600
• 52700

Round 0.00258954 to 4 significant figures.

• 0.0025
• 0.002589
• 0.002580
• 0.002590

Round 1235 to 2 significant figures.

• 12
• 1200
• 1200.
• 1200.00

Round 509.96 to 4 significant figures

• 509.9

• 509.0

• 510.0

• 510

153.89

Round to 2 significant figures.

(a)  

Calculate 12.47 m ÷ 3.2 s and give your answer with the correct number of significant figures.

• 4 m/s
• 3.9 m/s
• 3.90 m/s
• 3.897 m/s

Calculate 7.987 m - 0.54 m and give your answer with the correct number of significant figures.

• 7.45 m
• 7.447 m
• 7.4 m
• 7.5 m