Answer
See the explanation
Work Step by Step
When multiplying and dividing numbers, the result should have the same number of $\textbf{significant figures}$ as the least precise number used in the multiplication or division.
For example, $1001.00$ has six significant figures and $0.5000$ has four, so, the result of $1001.00\cdot0.5000$ should have four significant figures as $0.5000$.
When adding or subtracting numbers, the result should have the same number of $\textbf{significant decimal places}$ as the least precise number used in the addition or subtraction.
For example, $1001.00$ has two significant decimal places and $0.5000$ has four, so, the result of $1001.00+0.5000$ should have two significant decimal places as $1001.00$.
