1⃣️Estimate the relative error limit based on significant figures
Solving formula:
⚠️ Among them, er is the relative error limit, and e is the absolute error limit.
It is not difficult to draw a conclusion that the relative error limit of the value is related to the effective number p and all effective numbers , and has nothing to do with n
Specific data example:
1⃣️ Estimate significant figures based on relative error limits
At this time, the number of digits of the absolute error limit np = -2, so we only look at the two digits after the decimal point and the integer part ,
3.14 has 3 digits after the decimal point and 3 digits of the integer part , so its effective digits are 3 digits.