Question

with significant rule
15.3+45.90

Answer 1

With addition, in order to determine the number of sig figs, you have to count the amount of the numbers after the decimal place. Your answer should have the lowest amount of sig figs. So, the first number has one number after the decimal place so, it has one sig fig. The second number has two numbers after the decimal place so, it has two sig figs. Therefore, your answer should only have one sig fig after the decimal place. The answer for this one should be 61.2