Significant Figures

Question 1

rules for all SF

Answer 1

Leading 0 are never SF
Imbeaded ) are always SF
Trailing ) are only SF if there is a decimal

Question 2

Rounding 5

Answer 2

If preceeding number is odd, round up

If preceeding number is even, let it be

Question 3

Adding and substracting

Answer 3

Count the # of decimal places

The answer should have the same as the smallest # of decimal places

Question 4

Multification and division

Answer 4

Count the number of SF,

the answer shoud have the same as the least SF