Question

12.63 - 10.2 = 2.34 ~~ 2.4

Answer 1

The value of the expression is:

• For addition and subtraction, answer's significant digits should be equal to the lowest significant digit number.
•       12.63 - 10.2

            = 2.43

        No. of significant digits in 12.63 = 4

        No. of significant digits in 10.2 = 3

•   Lower significant digit = 3
• As our answer has 3 significant digits, it remains as it is.
• Answer = 2.43