Sweet Estimation worksheet for practicing rounding and addition.
A math worksheet titled "Sweet Estimation" that teaches students to estimate sums by rounding numbers to the nearest hundred, featuring addition problems with blank spaces for answers and a decorative candy theme.
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Show Answer Key & Explanations
Step-by-step solution for: Rounding: Sweet Estimation | Interactive Worksheet
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Show Answer Key & Explanations
Step-by-step solution for: Rounding: Sweet Estimation | Interactive Worksheet
Let's solve the "Sweet Estimation" worksheet step by step. The goal is to estimate the sum of each addition problem by rounding each number to the nearest hundred, then adding the rounded numbers.
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1. Round each number in the addition problem to the nearest hundred.
2. Add the rounded numbers.
3. Write the estimated sum.
We’ll go through each problem:
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- 189 → nearest hundred: 200
- 334 → nearest hundred: 300
- Estimated sum: $ 200 + 300 = \boxed{500} $
✔ Answer: 500
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- 441 → nearest hundred: 400
- 323 → nearest hundred: 300
- Estimated sum: $ 400 + 300 = \boxed{700} $
✔ Answer: 700
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- 252 → nearest hundred: 300
- 368 → nearest hundred: 400
- Estimated sum: $ 300 + 400 = \boxed{700} $
✔ Answer: 700
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- 363 → nearest hundred: 400
- 429 → nearest hundred: 400
- Estimated sum: $ 400 + 400 = \boxed{800} $
✔ Answer: 800
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- 598 → nearest hundred: 600
- 176 → nearest hundred: 200
- Estimated sum: $ 600 + 200 = \boxed{800} $
✔ Answer: 800
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- 625 → nearest hundred: 600
- 238 → nearest hundred: 200
- Estimated sum: $ 600 + 200 = \boxed{800} $
✔ Answer: 800
---
- 324 → nearest hundred: 300
- 150 → nearest hundred: 200
- Estimated sum: $ 300 + 200 = \boxed{500} $
✔ Answer: 500
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- 716 → nearest hundred: 700
- 202 → nearest hundred: 200
- Estimated sum: $ 700 + 200 = \boxed{900} $
✔ Answer: 900
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- 137 → nearest hundred: 100
- 381 → nearest hundred: 400
- Estimated sum: $ 100 + 400 = \boxed{500} $
✔ Answer: 500
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- 681 → nearest hundred: 700
- 99 → nearest hundred: 100
- Estimated sum: $ 700 + 100 = \boxed{800} $
✔ Answer: 800
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- 528 → nearest hundred: 500
- 145 → nearest hundred: 100
- Estimated sum: $ 500 + 100 = \boxed{600} $
✔ Answer: 600
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- 848 → nearest hundred: 800
- 136 → nearest hundred: 100
- Estimated sum: $ 800 + 100 = \boxed{900} $
✔ Answer: 900
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- 463 → nearest hundred: 500
- 276 → nearest hundred: 300
- Estimated sum: $ 500 + 300 = \boxed{800} $
✔ Answer: 800
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- 701 → nearest hundred: 700
- 163 → nearest hundred: 200
- Estimated sum: $ 700 + 200 = \boxed{900} $
✔ Answer: 900
---
- 648 → nearest hundred: 600
- 220 → nearest hundred: 200
- Estimated sum: $ 600 + 200 = \boxed{800} $
✔ Answer: 800
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| Problem | Rounded Numbers | Estimated Sum |
|--------|------------------|----------------|
| 1. 189 + 334 | 200 + 300 | 500 |
| 2. 441 + 323 | 400 + 300 | 700 |
| 3. 252 + 368 | 300 + 400 | 700 |
| 4. 363 + 429 | 400 + 400 | 800 |
| 5. 598 + 176 | 600 + 200 | 800 |
| 6. 625 + 238 | 600 + 200 | 800 |
| 7. 324 + 150 | 300 + 200 | 500 |
| 8. 716 + 202 | 700 + 200 | 900 |
| 9. 137 + 381 | 100 + 400 | 500 |
|10. 681 + 99 | 700 + 100 | 800 |
|11. 528 + 145 | 500 + 100 | 600 |
|12. 848 + 136 | 800 + 100 | 900 |
|13. 463 + 276 | 500 + 300 | 800 |
|14. 701 + 163 | 700 + 200 | 900 |
|15. 648 + 220 | 600 + 200 | 800 |
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- Look at the tens digit:
- If it’s less than 50, round down.
- If it’s 50 or more, round up.
Example:
- 252 → tens digit is 5, so round up → 300
- 324 → tens digit is 2 (less than 5), so round down → 300
---
✔ All problems are solved! You can now fill in the blanks on the worksheet with these estimated sums.
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🔍 Step-by-Step Instructions:
1. Round each number in the addition problem to the nearest hundred.
2. Add the rounded numbers.
3. Write the estimated sum.
We’ll go through each problem:
---
1. $ 189 + 334 $
- 189 → nearest hundred: 200
- 334 → nearest hundred: 300
- Estimated sum: $ 200 + 300 = \boxed{500} $
✔ Answer: 500
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2. $ 441 + 323 $
- 441 → nearest hundred: 400
- 323 → nearest hundred: 300
- Estimated sum: $ 400 + 300 = \boxed{700} $
✔ Answer: 700
---
3. $ 252 + 368 $
- 252 → nearest hundred: 300
- 368 → nearest hundred: 400
- Estimated sum: $ 300 + 400 = \boxed{700} $
✔ Answer: 700
---
4. $ 363 + 429 $
- 363 → nearest hundred: 400
- 429 → nearest hundred: 400
- Estimated sum: $ 400 + 400 = \boxed{800} $
✔ Answer: 800
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5. $ 598 + 176 $
- 598 → nearest hundred: 600
- 176 → nearest hundred: 200
- Estimated sum: $ 600 + 200 = \boxed{800} $
✔ Answer: 800
---
6. $ 625 + 238 $
- 625 → nearest hundred: 600
- 238 → nearest hundred: 200
- Estimated sum: $ 600 + 200 = \boxed{800} $
✔ Answer: 800
---
7. $ 324 + 150 $
- 324 → nearest hundred: 300
- 150 → nearest hundred: 200
- Estimated sum: $ 300 + 200 = \boxed{500} $
✔ Answer: 500
---
8. $ 716 + 202 $
- 716 → nearest hundred: 700
- 202 → nearest hundred: 200
- Estimated sum: $ 700 + 200 = \boxed{900} $
✔ Answer: 900
---
9. $ 137 + 381 $
- 137 → nearest hundred: 100
- 381 → nearest hundred: 400
- Estimated sum: $ 100 + 400 = \boxed{500} $
✔ Answer: 500
---
10. $ 681 + 99 $
- 681 → nearest hundred: 700
- 99 → nearest hundred: 100
- Estimated sum: $ 700 + 100 = \boxed{800} $
✔ Answer: 800
---
11. $ 528 + 145 $
- 528 → nearest hundred: 500
- 145 → nearest hundred: 100
- Estimated sum: $ 500 + 100 = \boxed{600} $
✔ Answer: 600
---
12. $ 848 + 136 $
- 848 → nearest hundred: 800
- 136 → nearest hundred: 100
- Estimated sum: $ 800 + 100 = \boxed{900} $
✔ Answer: 900
---
13. $ 463 + 276 $
- 463 → nearest hundred: 500
- 276 → nearest hundred: 300
- Estimated sum: $ 500 + 300 = \boxed{800} $
✔ Answer: 800
---
14. $ 701 + 163 $
- 701 → nearest hundred: 700
- 163 → nearest hundred: 200
- Estimated sum: $ 700 + 200 = \boxed{900} $
✔ Answer: 900
---
15. $ 648 + 220 $
- 648 → nearest hundred: 600
- 220 → nearest hundred: 200
- Estimated sum: $ 600 + 200 = \boxed{800} $
✔ Answer: 800
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✔ Final Answers (in order):
| Problem | Rounded Numbers | Estimated Sum |
|--------|------------------|----------------|
| 1. 189 + 334 | 200 + 300 | 500 |
| 2. 441 + 323 | 400 + 300 | 700 |
| 3. 252 + 368 | 300 + 400 | 700 |
| 4. 363 + 429 | 400 + 400 | 800 |
| 5. 598 + 176 | 600 + 200 | 800 |
| 6. 625 + 238 | 600 + 200 | 800 |
| 7. 324 + 150 | 300 + 200 | 500 |
| 8. 716 + 202 | 700 + 200 | 900 |
| 9. 137 + 381 | 100 + 400 | 500 |
|10. 681 + 99 | 700 + 100 | 800 |
|11. 528 + 145 | 500 + 100 | 600 |
|12. 848 + 136 | 800 + 100 | 900 |
|13. 463 + 276 | 500 + 300 | 800 |
|14. 701 + 163 | 700 + 200 | 900 |
|15. 648 + 220 | 600 + 200 | 800 |
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📝 Tips for Rounding to the Nearest Hundred:
- Look at the tens digit:
- If it’s less than 50, round down.
- If it’s 50 or more, round up.
Example:
- 252 → tens digit is 5, so round up → 300
- 324 → tens digit is 2 (less than 5), so round down → 300
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✔ All problems are solved! You can now fill in the blanks on the worksheet with these estimated sums.
Parent Tip: Review the logic above to help your child master the concept of 3rd grade estimation worksheet.
