Round to the Nearest Ten Calculator
Round numbers to the nearest multiple of 10 using the ones digit rule
Round Number to Nearest Ten
Enter any number to round to the nearest multiple of 10
Ten Rounding Examples
Round Down Examples
Ones digit 0-4: round down
Round Up Examples
Ones digit 5-9: round up
Ten Rounding Rules
Look at Ones Digit
The digit in the ones place determines rounding
Round Down (0-4)
If ones digit is 0, 1, 2, 3, or 4
Replace ones digit with 0
Round Up (5-9)
If ones digit is 5, 6, 7, 8, or 9
Add 1 to tens place, ones becomes 0
Multiples of 10
Numbers ending in 0 stay the same
Already rounded to nearest ten
Place Value Guide
Example: 1,234
Look at ones (4) to round to tens
Rounding Tips
Always look at the ones digit, not any other place
5 is the "halfway" point - it rounds up by convention
Negative numbers follow the same ones digit rule
Decimal parts also trigger rounding based on ones digit
Understanding Ten Rounding
What is Rounding to the Nearest Ten?
Rounding to the nearest ten means finding the closest multiple of 10 to a given number. This simplifies numbers by eliminating the ones digit, making calculations easier and providing useful approximations.
The Ones Digit Rule
- •Look only at the ones digit (rightmost digit)
- •If ones digit is 0-4: round down (keep tens digit)
- •If ones digit is 5-9: round up (add 1 to tens digit)
- •Replace ones digit with 0 in final answer
Step-by-Step Process
Example: 47 → 50
- 1. Identify the ones digit: 7
- 2. Compare to 5: 7 ≥ 5 ✓
- 3. Round up: 40 + 10 = 50
- 4. Final answer: 50
Special Cases
Decimal Numbers
1234.56 → look at ones digit (4), round down to 1230
Negative Numbers
-47 → ones digit (7) ≥ 5, round away from zero to -50
Already Multiples of 10
1230 → already ends in 0, stays 1230
Real-World Applications
Estimation & Mental Math
Quickly estimate sums, differences, and products by rounding to the nearest ten for easier mental calculations.
Data Analysis
Simplify large datasets and create cleaner charts by rounding values to the nearest ten for better visualization.
Inventory & Counting
Round inventory counts and population figures to tens for easier reporting and approximate planning.