Estimation - Class Playground - Free Printable

You're working on a Front End Estimation worksheet. This is a math strategy where you round each number to its leftmost digit (front end) and then add those rounded numbers to get an approximate sum.

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✔ How Front End Estimation Works:

- Look at the first digit of each number.
- Round each number to the nearest place value of that first digit.
- For example:
- 456 → front digit is 4 in the hundreds place → round to 400
- 347 → front digit is 3 in the hundreds place → round to 300
- Then add the rounded numbers: 400 + 300 = 700

This gives you a quick, rough estimate — not the exact answer.

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Let’s solve each problem using this method:

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Row 1

1. 761 + 217
→ 761 → 700 (hundreds place)
→ 217 → 200 (hundreds place)
→ 700 + 200 = 900

2. 862 + 863
→ 862 → 800
→ 863 → 800
→ 800 + 800 = 1600

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Row 2

3. 362 + 104
→ 362 → 300
→ 104 → 100
→ 300 + 100 = 400

4. 789 + 297
→ 789 → 700
→ 297 → 200
→ 700 + 200 = 900

5. 425 + 201
→ 425 → 400
→ 201 → 200
→ 400 + 200 = 600

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Row 3

6. 961 + 415
→ 961 → 900
→ 415 → 400
→ 900 + 400 = 1300

7. 346 + 298
→ 346 → 300
→ 298 → 200
→ 300 + 200 = 500

8. 256 + 229
→ 256 → 200
→ 229 → 200
→ 200 + 200 = 400

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Row 4

9. 873 + 332
→ 873 → 800
→ 332 → 300
→ 800 + 300 = 1100

10. 708 + 261
→ 708 → 700
→ 261 → 200
→ 700 + 200 = 900

11. 167 + 425
→ 167 → 100
→ 425 → 400
→ 100 + 400 = 500

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Row 5

12. 199 + 317
→ 199 → 100
→ 317 → 300
→ 100 + 300 = 400

13. 223 + 198
→ 223 → 200
→ 198 → 100
→ 200 + 100 = 300

14. 734 + 432
→ 734 → 700
→ 432 → 400
→ 700 + 400 = 1100

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## ✔ Final Answers (Fill in the blanks):

```
761 + 217 → 700 + 200 → 900
862 + 863 → 800 + 800 → 1600

362 + 104 → 300 + 100 → 400
789 + 297 → 700 + 200 → 900
425 + 201 → 400 + 200 → 600

961 + 415 → 900 + 400 → 1300
346 + 298 → 300 + 200 → 500
256 + 229 → 200 + 200 → 400

873 + 332 → 800 + 300 → 1100
708 + 261 → 700 + 200 → 900
167 + 425 → 100 + 400 → 500

199 + 317 → 100 + 300 → 400
223 + 198 → 200 + 100 → 300
734 + 432 → 700 + 400 → 1100
```

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📌 Tip: Always look at the first digit and round to that place value (e.g., hundreds for 3-digit numbers starting with 1–9). Don’t worry about exact sums — this is estimation!

Let me know if you’d like to compare these estimates to actual sums!