4
Section 1 Whole Numbers
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Calculate−1,382 sq ft
Buy−1,400 sq ft
Goodheart-Willcox Publisher
When calculating material estimates for a project, numbers are generally rounded
up to account for how materials are sold or for waste factor. Other times, numbers
can be rounded up or down to a specifi c place value depending on the situation.
Steps for Rounding to a Nearest Place Value
1. Identify the place value to which the number is being rounded.
2. Identify the digit to the right of that place value.
3. If the digit to the right is 5 or greater, increase the place value number up by
one (round up). If the digit to the right is 4 or less, do not change the place
value number.
4. Change the remaining digits to the right to zeros.
Round the number 34,673 to the thousands place value.
The number in the thousands place value is 4.
34,673
The digit to the right of the 4 is 6.
34,673
Since 6 is greater than 5, the 4 is rounded up by one, making it 5. The remaining
numbers to the right are changed to zero.
35,000
Example 1-3