Rounding Whole Numbers
Rounding Whole Numbers to Any Place
Rounding makes numbers simpler and easier to work with while keeping them close to their original value. You can round a multi-digit number to any place value, such as the nearest ten, hundred, thousand, or ten thousand.
The Rules of Rounding
To round a number to a specific place value, follow these simple steps:
- Find the target place: Identify the digit in the place you are rounding to.
- Look to the right: Look at the digit immediately to the right of your target place.
- Round Up (5 or more): If the digit to the right is 5,6,7,8, or 9, add 1 to your target digit.
- Round Down (4 or less): If the digit to the right is 0,1,2,3, or 4, keep your target digit exactly the same.
- Change to zeros: Change all the digits to the right of your target place to zeros.
Example Problems
Example 1: Round 74,582 to the nearest thousand
- Target place: The digit in the thousands place is 4.
- Look right: The digit to the right (in the hundreds place) is 5.
- Rule: Because the digit is 5, you round up. The 4 becomes a 5.
- Answer: 75,000
Example 2: Round 345,678 to the nearest ten thousand
- Target place: The digit in the ten thousands place is 4.
- Look right: The digit to the right (in the thousands place) is 5.
- Rule: Because the digit is 5, you round up. The 4 becomes a 5.
- Answer: 350,000
Example 3: Round 6,749 to the nearest hundred
- Target place: The digit in the hundreds place is 7.
- Look right: The digit to the right (in the tens place) is 4.
- Rule: Because the digit is 4, you round down. The 7 stays the same.
- Answer: 6,700