Round Numbers activity - Free Printable

Problem Explanation:

The task involves rounding numbers to the nearest 10 and the nearest 100. The rules for rounding are as follows:
- Rounding to the nearest 10:
- If the digit in the ones place is 5 or greater, round up.
- If the digit in the ones place is less than 5, round down.
- Rounding to the nearest 100:
- If the digit in the tens place is 5 or greater, round up.
- If the digit in the tens place is less than 5, round down.

Solution:

#### Part 1: Rounding to the nearest 10
We will round each number to the nearest 10 based on the rules provided.

1. 92: The ones digit is 2 (less than 5), so round down.
Answer: 90

2. 72: The ones digit is 2 (less than 5), so round down.
Answer: 70

3. 45: The ones digit is 5 (equal to 5), so round up.
Answer: 50

4. 30: The ones digit is 0, so it is already a multiple of 10.
Answer: 30

5. 75: The ones digit is 5 (equal to 5), so round up.
Answer: 80

6. 49: The ones digit is 9 (greater than 5), so round up.
Answer: 50

7. 69: The ones digit is 9 (greater than 5), so round up.
Answer: 70

8. 28: The ones digit is 8 (greater than 5), so round up.
Answer: 30

9. 2: The ones digit is 2 (less than 5), so round down.
Answer: 0

10. 14: The ones digit is 4 (less than 5), so round down.
Answer: 10

11. 9: The ones digit is 9 (greater than 5), so round up.
Answer: 10

12. 65: The ones digit is 5 (equal to 5), so round up.
Answer: 70

#### Final Answers for Part 1:
1. 90
2. 70
3. 50
4. 30
5. 80
6. 50
7. 70
8. 30
9. 0
10. 10
11. 10
12. 70

---

#### Part 2: Rounding to the nearest 100
We will round each number to the nearest 100 based on the rules provided.

1. 281: The tens digit is 8 (greater than 5), so round up.
Answer: 300

2. 908: The tens digit is 0 (less than 5), so round down.
Answer: 900

3. 720: The tens digit is 2 (less than 5), so round down.
Answer: 700

4. 786: The tens digit is 8 (greater than 5), so round up.
Answer: 800

5. 305: The tens digit is 0 (less than 5), so round down.
Answer: 300

6. 450: The tens digit is 5 (equal to 5), so round up.
Answer: 500

7. 549: The tens digit is 4 (less than 5), so round down.
Answer: 500

8. 852: The tens digit is 5 (equal to 5), so round up.
Answer: 900

9. 234: The tens digit is 3 (less than 5), so round down.
Answer: 200

10. 565: The tens digit is 6 (greater than 5), so round up.
Answer: 600

11. 302: The tens digit is 0 (less than 5), so round down.
Answer: 300

12. 692: The tens digit is 9 (greater than 5), so round up.
Answer: 700

#### Final Answers for Part 2:
1. 300
2. 900
3. 700
4. 800
5. 300
6. 500
7. 500
8. 900
9. 200
10. 600
11. 300
12. 700

---

Final Answer:

Part 1:
1. 90
2. 70
3. 50
4. 30
5. 80
6. 50
7. 70
8. 30
9. 0
10. 10
11. 10
12. 70

Part 2:
1. 300
2. 900
3. 700
4. 800
5. 300
6. 500
7. 500
8. 900
9. 200
10. 600
11. 300
12. 700

Boxed Final Answer:
\[
\boxed{
\begin{array}{ll}
\text{Part 1:} & 90, 70, 50, 30, 80, 50, 70, 30, 0, 10, 10, 70 \\
\text{Part 2:} & 300, 900, 700, 800, 300, 500, 500, 900, 200, 600, 300, 700 \\
\end{array}
}
\]