How do we determine significant figures in calculations involving both addition/subtraction and multiplication/ division?

Problem 9Q

How do we determine significant figures in calculations involving both addition/subtraction and multiplication/ division?

Solution: Here, we are going to explain the rule for determining significant figures in calculations involving both addition/subtraction and multiplication/ division?

Step1:

If a calculation involves a number of steps, the result should contain the same number of significant figures as that of the least precise number involved, other than the exact numbers.

Step2:

For example, for the calculation 943 x 0.00345 +101, the first two numbers are to be multiplied initially as follows:

943 x 0.00345...