2-2: Significant Figures - Adding, Subtracting, Multiplying, and Dividing

Question 1

Rules for addition and subtraction

Answer 1

1. Cannot assume zero comes after numbers
2. The answer needs to have the same amount of digits as the number with the fewest number of digits AFTER the decimal place
3. Round whole numbers to keep the final significant digit

Question 2

Rules for multiplication and division

Answer 2

1. The answer can have no more significant figures than there are in the measurement with the fewest number of significant figures.
2. Cannot assume zeros exist after numbers