SIGNIFICANT FIGURES. help!?

Question

can ya'll help me with these here problems? it also says to leave the appropriatte number of significant figures in the answer. thanks.


a. 98512- 48.3
b. 3351.2- 40
c. 1000 x 48.3
d. 385/ 0.85
e. 1.008 / 0.500

Answer 1

Please remember the simple rules:
When multiplying or dividing numbers, the result is rounded to the number of significant figures in the factor with the least significant figures. Here, the quantity of significant figures in each of the factors is important—not the position of the significant figures.
When adding or subtracting using significant figures rules, results are rounded to the position of the least significant digit in the most uncertain of the numbers being summed (or subtracted). That is, the result is rounded to the last digit that is significant in each of the numbers being summed. Here the position of the significant figures is important, but the quantity of significant figures is irrelevant.
a) round to one's.
b) round to one's.
c) take three significant figures
d) take two significant figures
e) take three significant figures