Round 3.75 to the nearest whole number
The Correct Answer and Explanation is:
To round 3.75 to the nearest whole number, follow these steps:
- Identify the tenths place:
The number 3.75 has a whole number part (3) and a decimal part (.75). The decimal part is divided into tenths and hundredths. The tenths place in 3.75 is the digit 7. - Determine whether to round up or down:
The general rule for rounding is as follows:
- If the digit in the tenths place is 5 or greater, round the number up to the next whole number.
- If the digit in the tenths place is less than 5, round the number down (or keep the whole number part the same). In the case of 3.75, the digit in the tenths place is 7, which is greater than 5.
- Round the number:
Since the tenths place is 7 (which is greater than 5), we round up the whole number from 3 to 4.
Thus, when rounding 3.75 to the nearest whole number, the answer is 4.
Explanation of Rounding:
Rounding is the process of adjusting the value of a number to make it simpler while keeping it close to the original value. Rounding to the nearest whole number is useful when you need a simpler approximation of a decimal number. The rules for rounding are based on how the digits in the decimal portion affect the overall value:
- If the tenths place is 5 or greater, the number is rounded up to the next whole number because the decimal value is closer to the next whole number.
- If the tenths place is less than 5, the number remains as it is in terms of the whole number, because the decimal value is closer to the current whole number.
Rounding ensures that you don’t carry around unnecessary decimal places when only a rough estimate is needed. In practical terms, rounding is used in various fields, including finance, statistics, and everyday measurements.