Let's solve this rounding worksheet step by step. The task is to
round numbers to the nearest 10 (questions 1–10) and to the
nearest 100 (questions 11–20).
---
🔷 Rounding Rules:
-
To the nearest 10: Look at the
ones digit.
- If it’s
5 or more, round
up.
- If it’s
less than 5, round
down.
-
To the nearest 100: Look at the
tens digit.
- If it’s
50 or more, round
up.
- If it’s
less than 50, round
down.
---
✔ Solutions:
####
Round to nearest 10:
1.
35 → 40
→ Ones digit is 5 → round up → 40
2.
78 → 80
→ Ones digit is 8 → round up → 80
3.
13 → 10
→ Ones digit is 3 → round down → 10
4.
65 → 70
→ Ones digit is 5 → round up → 70
5.
58 → 60
→ Ones digit is 8 → round up → 60
6.
42 → 40
→ Ones digit is 2 → round down → 40
7.
49 → 50
→ Ones digit is 9 → round up → 50
8.
31 → 30
→ Ones digit is 1 → round down → 30
9.
55 → 60
→ Ones digit is 5 → round up → 60
10.
18 → 20
→ Ones digit is 8 → round up → 20
---
####
Round to nearest 100:
11.
870 → 900
→ Tens digit is 70 → 70 ≥ 50 → round up → 900
12.
362 → 400
→ Tens digit is 60 → 60 ≥ 50 → round up → 400
13.
419 → 400
→ Tens digit is 10 → 10 < 50 → round down → 400
14.
162 → 200
→ Tens digit is 60 → 60 ≥ 50 → round up → 200
15.
812 → 800
→ Tens digit is 10 → 10 < 50 → round down → 800
16.
450 → 500
→ Tens digit is 50 → 50 = 50 → round up → 500
17.
525 → 500
→ Tens digit is 20 → 20 < 50 → round down → 500
18.
699 → 700
→ Tens digit is 90 → 90 ≥ 50 → round up → 700
19.
360 → 400
→ Tens digit is 60 → 60 ≥ 50 → round up → 400
20.
250 → 300
→ Tens digit is 50 → 50 = 50 → round up → 300
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✔ Final Answers:
| # | Answer |
|---|--------|
| 1 | 40 |
| 2 | 80 |
| 3 | 10 |
| 4 | 70 |
| 5 | 60 |
| 6 | 40 |
| 7 | 50 |
| 8 | 30 |
| 9 | 60 |
|10 | 20 |
|11 | 900 |
|12 | 400 |
|13 | 400 |
|14 | 200 |
|15 | 800 |
|16 | 500 |
|17 | 500 |
|18 | 700 |
|19 | 400 |
|20 | 300 |
---
📝 Summary:
This worksheet teaches rounding based on place value. The key is understanding which digit determines whether to round up or down:
- For
nearest 10, check the
ones digit.
- For
nearest 100, check the
tens digit.
Let me know if you'd like a printable version or an explanation for any specific problem!
Parent Tip: Review the logic above to help your child master the concept of rounding maths worksheet.
