Counting example
How Many Significant Figures Are in 100?
100 has 1 significant figure unless a decimal point or scientific notation is used to show extra precision.
Question
100
Answer
100 has 1 significant figure.
Step-by-step explanation
1
The digit 1 is non-zero, so it is significant.
2
The two trailing zeros are not significant because there is no decimal point.
3
To show three significant figures, write 100. or 1.00e+2.