Rounding numbers to the nearest 10 and 100 is a fundamental math concept that helps students understand place value and estimation. Here’s a comprehensive worksheet to help students practice rounding numbers to the nearest 10 and 100.
Rounding to the Nearest 10
Rounding numbers to the nearest 10 involves looking at the ones digit and deciding whether to round up or down.
- If the ones digit is 0-4, round down to the nearest 10.
- If the ones digit is 5-9, round up to the nearest 10.
Rounding to the Nearest 10 Examples
| Number | Rounded to the Nearest 10 |
|---|---|
| 14 | 10 |
| 27 | 30 |
| 31 | 30 |
| 46 | 50 |
| 93 | 90 |
Rounding to the Nearest 10 Exercises
Round the following numbers to the nearest 10:
- 17
- 23
- 49
- 67
- 85
Answers:
- 20
- 20
- 50
- 70
- 90
Rounding to the Nearest 100
Rounding numbers to the nearest 100 involves looking at the tens digit and deciding whether to round up or down.
- If the tens digit is 0-4, round down to the nearest 100.
- If the tens digit is 5-9, round up to the nearest 100.
Rounding to the Nearest 100 Examples
| Number | Rounded to the Nearest 100 |
|---|---|
| 117 | 100 |
| 243 | 200 |
| 351 | 400 |
| 467 | 500 |
| 982 | 1000 |
Rounding to the Nearest 100 Exercises
Round the following numbers to the nearest 100:
- 145
- 278
- 392
- 517
- 943
Answers:
- 100
- 300
- 400
- 500
- 900
Mixed Practice
Round the following numbers to the nearest 10 or 100:
- 63 (nearest 10)
- 219 (nearest 100)
- 47 (nearest 10)
- 982 (nearest 100)
- 135 (nearest 10)
Answers:
- 60
- 200
- 50
- 1000
- 140
📝 Note: Encourage students to use mental math and estimation to round numbers quickly and accurately.
FAQ Section
What is the rule for rounding numbers to the nearest 10?
+If the ones digit is 0-4, round down to the nearest 10. If the ones digit is 5-9, round up to the nearest 10.
What is the rule for rounding numbers to the nearest 100?
+If the tens digit is 0-4, round down to the nearest 100. If the tens digit is 5-9, round up to the nearest 100.
Why is rounding numbers important in math?
+Rounding numbers helps with estimation and mental math, making it easier to perform calculations and solve problems.
By mastering the concept of rounding numbers to the nearest 10 and 100, students will develop a strong foundation in math and improve their problem-solving skills. Encourage students to practice regularly to become more accurate and confident in their rounding abilities.
Related Terms:
- Rounding year 4 worksheets
