Let's solve the problem step by step.
Objective:
Round each decimal number to the
nearest tenth.
> 🔹 The
tenth place is the
first digit after the decimal point.
> 🔹 To round to the nearest tenth, look at the
hundredth place (second digit after the decimal).
> - If it’s
5 or greater, round
up the tenth place.
> - If it’s
less than 5, keep the tenth place as is.
---
Now let's go through each number:
---
1.
6.89
- Tenth: 8
- Hundredth: 9 → ≥ 5 → round up
- 6.8 + 0.1 =
6.9
2.
65.298
- Tenth: 2
- Hundredth: 9 → ≥ 5 → round up
- 65.2 + 0.1 =
65.3
3.
17.682
- Tenth: 6
- Hundredth: 8 → ≥ 5 → round up
- 17.6 + 0.1 =
17.7
4.
9.89
- Tenth: 8
- Hundredth: 9 → ≥ 5 → round up
- 9.8 + 0.1 =
9.9
5.
3.19
- Tenth: 1
- Hundredth: 9 → ≥ 5 → round up
- 3.1 + 0.1 =
3.2
6.
35.39
- Tenth: 3
- Hundredth: 9 → ≥ 5 → round up
- 35.3 + 0.1 =
35.4
7.
29.528
- Tenth: 5
- Hundredth: 2 → < 5 → stay same
-
29.5
8.
56.899
- Tenth: 8
- Hundredth: 9 → ≥ 5 → round up
- 56.8 + 0.1 =
56.9
9.
9.99
- Tenth: 9
- Hundredth: 9 → ≥ 5 → round up
- But 9.9 + 0.1 =
10.0
10.
32.812
- Tenth: 8
- Hundredth: 1 → < 5 → stay same
-
32.8
11.
28.598
- Tenth: 5
- Hundredth: 9 → ≥ 5 → round up
- 28.5 + 0.1 =
28.6
12.
5.11
- Tenth: 1
- Hundredth: 1 → < 5 → stay same
-
5.1
13.
6.291
- Tenth: 2
- Hundredth: 9 → ≥ 5 → round up
- 6.2 + 0.1 =
6.3
14.
2.001
- Tenth: 0
- Hundredth: 0 → < 5 → stay same
-
2.0
15.
26.357
- Tenth: 3
- Hundredth: 5 → ≥ 5 → round up
- 26.3 + 0.1 =
26.4
16.
3.21
- Tenth: 2
- Hundredth: 1 → < 5 → stay same
-
3.2
---
✔ Final Answers:
| Original | Rounded |
|---------|--------|
| 6.89 → |
6.9 |
| 65.298 → |
65.3 |
| 17.682 → |
17.7 |
| 9.89 → |
9.9 |
| 3.19 → |
3.2 |
| 35.39 → |
35.4 |
| 29.528 → |
29.5 |
| 56.899 → |
56.9 |
| 9.99 → |
10.0 |
| 32.812 → |
32.8 |
| 28.598 → |
28.6 |
| 5.11 → |
5.1 |
| 6.291 → |
6.3 |
| 2.001 → |
2.0 |
| 26.357 → |
26.4 |
| 3.21 → |
3.2 |
---
📌 Summary of Rule:
- Look at the
hundredths digit (the second decimal).
- If it's
5 or more,
round up the tenths digit.
- If it's
less than 5,
keep the tenths digit.
Let me know if you'd like this printed or formatted for a worksheet!
Parent Tip: Review the logic above to help your child master the concept of rounding decimal worksheet.
