1. Significant Figures

2. Significant figures
Digits of a number kept in place by zeros where necessary.
Zeros at the beginning or end don’t 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. =
to 1 s.f. =
to 3 s.f. =
to 2 s.f. =
49000
0.06
375
Fill in zeros up to but not after the decimal point.