Explain Rounding and Estimating Whole Number
Rounding is a way of simplifying numbers to make them easier to understand or work with. Rounding can be used when an exact number isn't needed, and an approximate answer will do. For example, at the minute this is being written, exactly 299,588,632 people live in the United States (See the . Census Bureau Population Clock .), but that number changes every day. And it's not likely you'll need to know exactly how many people live in the United States at any given moment. Instead, you could simplify that number by "rounding" it to 300 million. How does that work? Follow the steps below to learn how to round a whole number.