The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
There are at most as many as the smaller of the number of significant numbers in the dividend (numerator) and divisor (denominator).
231.57 has five significant figures/numbers. All the numbers in 231.57 are significant.
multiplication/division: least number of significant figures addition/subtraction: least number of numbers to the right of decimal point
The figure 18.03 has a total of four significant numbers
Three. All nonzero numbers are significant, and any zeros in between significant numbers are significant.
Because 10.00400 is 10.004, this has five significant digits (numbers).
3 significant figures.
It has five significant figures.
7 significant figures.
3 significant figures.
There are 5 significant figures.
Two significant figures.
Four significant figures.