📚 Topic Summary
Rounding decimals to the nearest hundredth means finding the closest value to a decimal number, but only going up to two places after the decimal point. To do this, you look at the digit in the thousandths place (the third digit after the decimal). If that digit is 5 or greater, you round the hundredths digit up. If it's less than 5, you leave the hundredths digit as it is. Think of it like estimating to make numbers easier to work with!
For example, if you have the number 3.145, you look at the '5' in the thousandths place. Since it is 5 or more, you round the '4' in the hundredths place up to '5', making the rounded number 3.15. If you had 3.142, you would leave the '4' as it is, making the rounded number 3.14.
🧮 Part A: Vocabulary
Match the terms to their definitions:
| Term |
Definition |
| 1. Decimal |
a. The third digit after the decimal point |
| 2. Hundredth |
b. A number that uses a decimal point to show values less than one |
| 3. Rounding |
c. The second digit after the decimal point |
| 4. Thousandth |
d. Approximating a number to a specified place value |
| 5. Place Value |
e. The value of a digit based on its position in a number |
✍️ Part B: Fill in the Blanks
Rounding helps us make numbers simpler. When rounding to the nearest __________, we look at the digit in the __________ place. If that digit is 5 or more, we round __________; if it is less than 5, we round __________. For example, 2.346 rounded to the nearest hundredth is __________. If the number was 2.343, it would round to __________.
🤔 Part C: Critical Thinking
Explain in your own words why rounding decimals is a useful skill in everyday life. Give at least two examples of situations where you might use it.