Rounding 138.2 to the Nearest Tenth
The number 138.2 rounded to the nearest tenth is 138.2.
Step-by-Step Guide
Let's break down the process of rounding 138.2 to the nearest tenth:
Step 1: Identify the tenths and hundredths digits
In 138.2, the tenths digit is 2 and the hundredths digit is 9.
Step 2: Look at the hundredths digit
If the hundredths digit is 5 or greater, round up. If it's less than 5, round down.
Step 3: Round accordingly
The hundredths digit is 9, so we round up.
Similar Calculations
Here are some similar numbers rounded to the nearest tenth:
| Original Number |
Rounded to Tenth |
| 138.2 |
138 |
| 138.223 |
138 |
| 138.282 |
138 |
| 138.132 |
138 |
| 138.176 |
138 |
Understanding Rounding to the Nearest Tenth
Rounding to the nearest tenth is a common mathematical operation used in various fields. It helps simplify numbers while maintaining a useful level of precision.
Key Points:
- When rounding to the nearest tenth, we look at the digit in the next place value to the right.
- If this digit is 5 or more, we round up. If it's less than 5, we round down.
- All digits to the right of the tenth place are replaced with zeros after rounding.
Practical Applications:
- Finance: Rounding currency values to the nearest cent (hundredth).
- Science: Adjusting measurements to the appropriate level of precision.
- Engineering: Ensuring calculations are practical for manufacturing or construction.
- Everyday math: Simplifying numbers for easier mental calculations.
