Estimating Products Worksheets - 15 Worksheets Library - Free Printable

Let's solve the "Estimating Products" worksheet step by step.

Instructions:

> Round each whole number to the nearest hundred, then estimate the product.

We'll go through each problem and:
1. Round the first number to the nearest hundred.
2. Round the second number to the nearest hundred.
3. Multiply the rounded numbers to get an estimated product.

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Step-by-step Solutions

#### 1. $ 273 \times 125 $
- $ 273 \rightarrow 300 $ (nearest hundred)
- $ 125 \rightarrow 100 $ (nearest hundred)
- Estimated product: $ 300 \times 100 = 30,000 $

✔ Answer: $ 300 \times 100 = 30,000 $

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#### 2. $ 321 \times 251 $
- $ 321 \rightarrow 300 $
- $ 251 \rightarrow 300 $
- $ 300 \times 300 = 90,000 $

✔ Answer: $ 300 \times 300 = 90,000 $

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#### 3. $ 471 \times 341 $
- $ 471 \rightarrow 500 $
- $ 341 \rightarrow 300 $
- $ 500 \times 300 = 150,000 $

✔ Answer: $ 500 \times 300 = 150,000 $

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#### 4. $ 361 \times 234 $
- $ 361 \rightarrow 400 $
- $ 234 \rightarrow 200 $
- $ 400 \times 200 = 80,000 $

✔ Answer: $ 400 \times 200 = 80,000 $

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#### 5. $ 261 \times 152 $
- $ 261 \rightarrow 300 $
- $ 152 \rightarrow 200 $
- $ 300 \times 200 = 60,000 $

✔ Answer: $ 300 \times 200 = 60,000 $

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#### 6. $ 471 \times 241 $
- $ 471 \rightarrow 500 $
- $ 241 \rightarrow 200 $
- $ 500 \times 200 = 100,000 $

✔ Answer: $ 500 \times 200 = 100,000 $

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#### 7. $ 223 \times 151 $
- $ 223 \rightarrow 200 $
- $ 151 \rightarrow 200 $
- $ 200 \times 200 = 40,000 $

✔ Answer: $ 200 \times 200 = 40,000 $

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#### 8. $ 361 \times 134 $
- $ 361 \rightarrow 400 $
- $ 134 \rightarrow 100 $
- $ 400 \times 100 = 40,000 $

✔ Answer: $ 400 \times 100 = 40,000 $

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#### 9. $ 386 \times 142 $
- $ 386 \rightarrow 400 $
- $ 142 \rightarrow 100 $
- $ 400 \times 100 = 40,000 $

✔ Answer: $ 400 \times 100 = 40,000 $

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#### 10. $ 512 \times 123 $
- $ 512 \rightarrow 500 $
- $ 123 \rightarrow 100 $
- $ 500 \times 100 = 50,000 $

✔ Answer: $ 500 \times 100 = 50,000 $

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#### 11. $ 561 \times 131 $
- $ 561 \rightarrow 600 $
- $ 131 \rightarrow 100 $
- $ 600 \times 100 = 60,000 $

✔ Answer: $ 600 \times 100 = 60,000 $

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#### 12. $ 562 \times 252 $
- $ 562 \rightarrow 600 $
- $ 252 \rightarrow 300 $
- $ 600 \times 300 = 180,000 $

✔ Answer: $ 600 \times 300 = 180,000 $

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#### 13. $ 361 \times 120 $
- $ 361 \rightarrow 400 $
- $ 120 \rightarrow 100 $
- $ 400 \times 100 = 40,000 $

✔ Answer: $ 400 \times 100 = 40,000 $

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#### 14. $ 451 \times 321 $
- $ 451 \rightarrow 500 $
- $ 321 \rightarrow 300 $
- $ 500 \times 300 = 150,000 $

✔ Answer: $ 500 \times 300 = 150,000 $

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#### 15. $ 321 \times 221 $
- $ 321 \rightarrow 300 $
- $ 221 \rightarrow 200 $
- $ 300 \times 200 = 60,000 $

✔ Answer: $ 300 \times 200 = 60,000 $

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✔ Final Answers (Filling in the blanks):

| Problem | Rounded → | Product |
|--------|-----------|---------|
| 273 × 125 | 300 × 100 → 30,000 |
| 321 × 251 | 300 × 300 → 90,000 |
| 471 × 341 | 500 × 300 → 150,000 |
| 361 × 234 | 400 × 200 → 80,000 |
| 261 × 152 | 300 × 200 → 60,000 |
| 471 × 241 | 500 × 200 → 100,000 |
| 223 × 151 | 200 × 200 → 40,000 |
| 361 × 134 | 400 × 100 → 40,000 |
| 386 × 142 | 400 × 100 → 40,000 |
| 512 × 123 | 500 × 100 → 50,000 |
| 561 × 131 | 600 × 100 → 60,000 |
| 562 × 252 | 600 × 300 → 180,000 |
| 361 × 120 | 400 × 100 → 40,000 |
| 451 × 321 | 500 × 300 → 150,000 |
| 321 × 221 | 300 × 200 → 60,000 |

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📌 Summary:

This exercise helps students practice estimation by rounding numbers to the nearest hundred before multiplying. It builds number sense and quick mental math skills.

Let me know if you'd like this formatted as a printable answer key!