Problem: To how many significant figures should each answer be rounded?After rounding, the answer to equation A should havea. 1 significant figureb. 5 significant figurec. 2 significant figured. 3 significant figuree. 4 significant figure

We are asked for the number of significant figures in the answer to the problem. 

The number of significant figures depends on the operation we use:

1.  addition or subtraction - the least number of decimal places will determine the final answer. 

2. multiplication or division - the least number of significant figures will determine the final answer. 

We operate the ones in the brackets first in this order : () → [] → {}