Rounding means reducing the digits in a number while keeping its value similar but easier to use. To round, decide which is the last digit to keep, leave it the same if the next digit is less than 5, or increase it by 1 if the next digit is 5 or more. Examples show rounding numbers to different decimal places like hundredths or tenths. Practice problems apply rounding to whole numbers, decimals, and fractions converted to decimals.

1. Place Value and Rounding

2. What is Rounding?
Rounding means reducing the digits in a number
while trying to keep its value similar. The result is
less accurate, but easier to use.
Example: 73 rounded to the nearest ten is 70,
because 73 is closer to 70 than to 80.

3. How to round numbers
• Decide which is the last digit to keep
• Leave it the same if the next digit is less than
5 (this is called rounding down)
• Increase it by 1 if the next digit is 5 or more
(this is called rounding up)

6. Examples
1) Round 3.1416 to the hundredths
2) Round 1.2635 to the tenths
3) Round 1.9995 to 3 decimal places

7. Practice Problems
1. Round 6.189 to a whole number
2. Round 3.9942 to the tenths place
3. Write 7/8 as a decimal and round
to the hundredths place
4. What is 2/3 as a decimal?
(Round to the ten thousandths place)