What is 279.941 rounded to the nearest whole number?
The Correct Answer and Explanation is:
To round the number 279.941 to the nearest whole number, we need to look at the digit in the first decimal place, which is 9 (in the tenths place).
Rounding Rules:
- If the first decimal digit (tenths place) is 0, 1, 2, 3, or 4, we round down.
- If the first decimal digit is 5, 6, 7, 8, or 9, we round up.
In this case, since the first decimal digit is 9, we will round up.
To perform the rounding:
- Start with the original number: 279.941.
- Identify the whole number part, which is 279.
- Since the tenths place is 9, we round the whole number part up by 1.
Thus, we add 1 to 279:
[
279 + 1 = 280
]
Therefore, 279.941 rounded to the nearest whole number is 280.
Explanation of Rounding:
Rounding is a mathematical process used to simplify a number to make it easier to work with while retaining its approximate value. It is commonly used in various fields such as finance, statistics, and everyday calculations. Rounding helps in making estimations and comparisons more straightforward.
When we round numbers, we aim to maintain the value as close as possible to the original while adhering to specific rules. In practice, rounding can affect significant calculations and data analysis, especially when aggregating or averaging numbers.
In summary, rounding to the nearest whole number involves examining the decimal portion of a number and deciding whether to increase or maintain the whole number based on that digit. In the case of 279.941, we round up due to the presence of 9, leading us to the final rounded number 280.