Round 39,991 to the nearest ten. The number 39,991 rounded to the nearest ten is
The correct answer and explanation is:
The number 39,991 rounded to the nearest ten is 39,990.
To round a number to the nearest ten, the process involves looking at the digit in the ones place (the last digit) of the number. If the digit in the ones place is 5 or greater, the tens place is increased by 1, and all digits to the right of it are changed to 0. If the digit in the ones place is less than 5, the tens place remains the same, and the digits to the right become 0.
Here’s a step-by-step breakdown:
- Identify the tens place: In the number 39,991, the digit in the tens place is 9 (since 39,991 can be broken down as 39,990 + 1).
- Look at the ones place: The digit in the ones place is 1.
- Determine rounding rules: Since the digit in the ones place is less than 5 (it’s 1), the tens place will remain unchanged.
- Adjust the number: The tens place stays as 9, and the ones place becomes 0.
Therefore, rounding 39,991 to the nearest ten results in 39,990.
Rounding is a simple way to approximate a number for easier calculations or estimates. The process reduces the precision of the number while keeping it close to its original value. In this case, rounding 39,991 to 39,990 makes the number simpler, especially when performing mental calculations or when exact precision isn’t needed.