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Round any number to 1 decimal place (nearest tenth) instantly
• Look at the hundredths place (2nd decimal)
• If 5 or more, round up
• If less than 5, round down
• 3.456 → 3.5 (5 ≥ 5, round up)
• 2.34 → 2.3 (4 < 5, round down)
• 1.95 → 2.0 (5 ≥ 5, round up)
• 7.2 → 7.2 (already one decimal)
Enter a number to see the result
| Number | Rounded |
|---|---|
| 1.11 | 1.1 |
| 2.34 | 2.3 |
| 3.42 | 3.4 |
| 5.64 | 5.6 |
| 10.123 | 10.1 |
| 99.949 | 99.9 |
| Number | Rounded |
|---|---|
| 1.15 | 1.2 |
| 2.38 | 2.4 |
| 3.45 | 3.5 |
| 5.67 | 5.7 |
| 10.156 | 10.2 |
| 99.95 | 100.0 |
The tenths place is the first digit after the decimal point. This is where we want to round to.
Example: In 3.456, the tenths digit is 4.
The hundredths place is the second digit after the decimal point. This determines rounding direction.
• If hundredths digit is 5, 6, 7, 8, or 9: Round up
• If hundredths digit is 0, 1, 2, 3, or 4: Round down
Example: In 3.456, the hundredths digit is 5, so round up.
Adjust the tenths digit based on the rounding rule, then remove all digits after it.
Example: 3.456 becomes 3.5 (4 rounds up to 5, remove 56)
The nearest tenth is the first decimal place after the decimal point. It represents tenths of a whole number (0.1, 0.2, 0.3, etc.). Rounding to the nearest tenth means keeping only one digit after the decimal point.
Look at the hundredths digit (the second decimal place), which is 5. Since 5 rounds up, increase the tenths digit from 4 to 5, giving you 3.5.
2.95 rounds to 3.0. The hundredths digit (5) means we round up, so the tenths digit (9) becomes 10, which carries over to make the whole number 3.
Rounding to the nearest tenth simplifies numbers while maintaining reasonable precision. It's commonly used in measurements, grades, statistics, and scientific calculations where one decimal place provides adequate accuracy.
Use the same rule: look at the hundredths digit. For example, -3.45 rounds to -3.5 (5 rounds up toward zero becomes -3.5), and -3.44 rounds to -3.4.
If the number only has one decimal place or none at all, it stays the same or gets a zero added. For example, 3.4 stays 3.4, and 5 becomes 5.0.