# of significant figures
0.0031
What is 0.0031 to 2 significant figures?
301
Zeros between non-zero numbers are significant.
253, 400
What is 253400 to 4 significant figures?
50.00
Trailing zeros, also known as zeros behind a non-zero number AND after the decimal point are significant.
1010
What is 1010 to 3 significant figures?
152.32
All non-zero digits are significant.
30.02
What is 30.02 to 4 significant figures?
0.0025
All zeros to the left of non-zero digits are not significant, even if they are behind the decimal point.