In general, to round to a certain place value, look at the digit to the right of that place value and make a decision. Which is correct? They both are.
Which one you choose to use, depends upon your purpose. The second one is more accurate, because it's closer to the real answer 6. In general, it's more accurate to calculate first and then round. However, sometimes if you're doing mental math and you need a quick and very approximate answer, it's easier to round and then calculate.
See also significant digits. Names of standardized tests are owned by the trademark holders and are not affiliated with Varsity Tutors LLC. And if it is followed by 0, 1, 2, 3, 4 round the number down.
Rounding decimals to two decimal places is the same as rounding to the nearest hundredth. To round a number to the nearest hundredth, look at the digit at the right of the hundredth place and apply the same rule : if the digit in the thousandth place is 0, 1, 2, 3, 4, you will round down to the nearest hundredth or just remove all digits found at the right.
But, if the digit in the thousandth place is 5, 6, 7, 8, 9, you have to round up to the nearest hundredth, and then remove all the digits on the right. Rounding decimals to four decimal places refers to rounding to the nearest ten thousandth.
The next digit was 2, which is less than 5. So Wendell would've rounded down by keeping the last digit the same and replacing the remaining digit with 0 to get Rounding numbers makes them simpler and easier to use.
Although they're slightly less accurate, their values are still relatively close to what they originally were. People round numbers in many different situations, including many real-world situations you'll find yourself in on a regular basis.
Likewise, you may need an easy way to make simple calculations in your head to determine how many bags of candy you're able to buy at the store. How do you know that? Finally, it's often just easier to work with rounded numbers, because exact numbers aren't only required. If it takes about 25 minutes to get somewhere, it's simply easier to allow yourself 30 minutes of travel time. If you're talking about the population of New York City, it's easier to work with a figure of 8 million people rather than a more exact figure of 8,, people.
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