Final answer:
To calculate to the correct number of significant figures, follow certain rules. When adding/subtracting, round to the same decimal places. When multiplying/dividing, round to same significant figures. Keep track of rules and round off final answers.
Step-by-step explanation:
In order to calculate to the correct number of significant figures, we need to follow certain rules. When adding or subtracting numbers, the final answer should be rounded to the same number of decimal places as the least precise number. For example, in equation A) 43.7-2.341, since 43.7 has one decimal place and 2.341 has three decimal places, the final answer should be rounded to one decimal place, giving us 41.4 as the correct answer.
When multiplying or dividing numbers, the final answer should have the same number of significant figures as the number with the fewest significant figures. For example, in equation (a) 62.8 x 34, since 62.8 has three significant figures and 34 has two significant figures, the final answer should have two significant figures, giving us 2.1 x 10^3 as the correct answer.
Remember to always keep track of the rules for significant figures and round off your final answers accordingly.