Significant Figure
- Relevant digits in a measured quantity
Rules of rounding off a positive number to a
particular significant figure :
Digit is not zero is significant figure.
Zero between non-zero digit is significant figure.
Zero to the right of non-zero is not count as
significant figure except stated.
Zero to the right of non-zero digit in decimal is
significant figure.
Zero to the left of non-zero digit in decimal is
not significant figure.
Turn to next page for more examples of
rounding off rules
, a) Digit is not zero is significant figure.
Example :
1678 - 4 significant figure
9.81 - 3 significant figure
b)Zero between non-zero digit is significant figure.
Example :
40 567 - 5 significant figure
3.01 - 3 significant figure
c) Zero to the right of non-zero is not count as
significant figure except stated.
Example :
20 - 1 significant figure
1240 - 3 significant figure
2300 - 2 significant figure
Tips : Remember the word in blue and lined word.