Significant Figures

1
Significant Figures
2
Significant figures

• Digits of a number kept in place by zeros where
  necessary.
• Zeros at the beginning or end dont usually
  count, but zeros inside the number do.
• The rounded answer should be a suitable
  reflection of the original number e.g.
• 24,579 to 1 s.f could not possible be 2
• 24,579 to 1 s.f is 20,000

3
How do we decide on the significant figures?

• Count significant figures from the left, starting
  from the first non-zero digit.
• 49382 to 2 s.f.
• 0.05961 to 1 s.f.
• 374.582 to 3 s.f.
• 0.0009317 to 2 s.f.

49000
0.06
375
0.00093