1.1 Significant Figures (Sample Questions)


Example 1:
Calculate the value of 5.33 + 0.33 × 17 and give your answer correct to three significant figures.

Answer:
5.33 + 0.33 × 17
= 5.33 + 5.61
= 10.84
= 10.8 (3 s. f.)



Example 2:
Calculate the value of 49.3567 + 16.73 ÷ 0.5 and give your answer correct to four significant figures.

Answer:
49.3567 + 16.73 ÷ 0.5
= 49.3567 + 33.46
= 82.8167
= 82.82 (4 s. f.)



Example 3:
Calculate the value of 3.42 ÷ 12 × 3.7 and give your answer correct to four significant figures.

Answer:
3.42 ÷ 12 × 3.7
= 1.0545
= 1.055 (4 s. f.)