Question

Even though we are well into the course Dumbledore notices some of the students are still having trouble with significant figures. Let’s review them once more: How many significant figures does the result of the following calculation have? (3.478-2.31)*(4.428-3.56)?

Answer 1

3 significant figures

Explanation:

Hi there!

When dealing with operations and singificant figures we look for the number with least significant figures and that will be the number of significant figures we report, for the numbers inside the parenthesis we can see that we are susbtracting a 3 significant figure number to a 4 significant figure number, and the mupltiplying them. Therefore the result must be reported with 3 significnat figures:

(3.478-2.31)*(4.428-3.56) = 1.013824 = 1.01