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More Math  EnchantedLearning.com Rounding Numbers Information and Printable Worksheets 
Place Value 
Rounding is used to make a number easier to work with. For example, if you know that there are 496 students in your school, you can say that there are approximately 500 students in your school.
On a number line, you can see how rounding a number approximates its value.
Whole numbers can be rounded to the tens place, hundreds place, thousands place, and so on. When a number is rounded to the tens place, the final form has a zero for the ones digit. When a number is rounded to the hundreds place, the final form has a zero for both the tens digit and the ones digit.
Decimal numbers can also be rounded; this approximates the number to the nearest tenth, hundredth, thousandth, or other decimal place. When a decimal number is rounded to the tenths place, the final form has no digit in the hundredths place (or any places to the right of that). When a decimal number is rounded to the hundredths place, the final form has no digit in the thousandths place (or any places to the right of that).
How to Round Off a Number:
To round off a number, the digit to be rounded either remains the same or is increased by one, and one or more of the digits on the right are eliminated or changed to zero. In order to round a number, do the following:

Rounding can be used to make numbers easier to work with (and sometimes it is a necessity). For example, if 12 out of 107 people vote for candidate "C", you can quickly estimate the percent of votes for "C" to be roughly 10 out of 100 people or 1/10 of the people.
Examples of Rounding numbers:
Number  Nearest ten  Nearest hundred  Nearest thousand 

368  370  400  0 
1,234  1,230  1,200  1,000 
89,355  89,360  89,400  89,000 
Decimal numbers can also be rounded, estimating the number to the nearest tenth, hundredth, thousandth, and so on.
Examples of Rounding Decimals:
Number  Nearest tenth  Nearest hundredth  Nearest thousandth 

1.2346  1.2  1.23  1.235 
31.6479  31.6  31.65  31.648 
9.7462  9.7  9.75  9.746 
Worksheets on Rounding Numbers:
Round Numbers to the Nearest Tens using a number line Round off 10 numbers to the nearest tens digit using a number line. Or go to the answers. 
Round Numbers to the Nearest Hundreds using a number line Round off 10 numbers to the nearest hundreds digit using a number line. Or go to the answers. 
Round Numbers to the Nearest Tens, Hundreds, or Thousands Digit Round off the numbers to the nearest tens digit, hundreds digit, or thousands digit.
Worksheet #1 or go to the answers 
Round Numbers to the Nearest Tens, Hundreds, and Thousands Digit in a Grid On a grid, round off the numbers to the nearest tens digit, hundreds digit, and thousands digit.
Worksheet #1 or go to the answers 
Round Decimal Numbers to the Nearest Tenths using a number line Round off 10 decimal numbers to the nearest tenths digit using a number line. Or go to the answers. 
Round Decimal Numbers to the Nearest Tenth, Hundredth, or Thousandth Digit Round off the numbers to the nearest tenth digit, hundredth digit, or thousandth digit.
Worksheet #1 or go to the answers 
Round Decimal Numbers to the Nearest Tenths, Hundredths, and Thousandths Digit in a Grid On a grid, round off the decimal numbers to the nearest tenths digit, hundredths digit, and thousandths digit.
Worksheet #1 or go to the answers 
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