#26
Describe the rules that are used to determine the number of significant figures in the results of addition/subtraction and multiplication/division.
When multiplying or dividing, the answer should be rounded to contain the same number of significant figures as the least accurate number.
0.300 (3 s.f.) x 405.7009 (7 s.f.) = 3 s.f. in answer
5000. (4 s.f.) / 10.32 x 10^-10 (4 s.f.) = 4 s.f. in answer
When adding or subtracting, the answer should have the same number of decimal places as the least accurate number used in the calculation.
84 + 87,600 + 9.005 = round answer to the nearest whole number
10.00405 - 5,400.5 + 6.32 = round answer to nearest tenth
