4th Grade Estimation Worksheets - Free Printable

It looks like you've uploaded an image of a math worksheet titled "Estimating Sums of Money". The task involves estimating the sum of two amounts of money by rounding to the nearest dollar and then adding.

Let me walk through how to solve each problem step-by-step, using the method shown in the example:

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🔹 Example Given:

- $14.75 + $9.20
- Round $14.75 → $15 (since 0.75 is closer to 1)
- Round $9.20 → $9 (since 0.20 is closer to 0)
- Estimated sum: $15 + $9 = $24

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Now let’s go through each problem on the worksheet.

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✔ Part A: Estimate the sum. Then add the actual numbers.

#### 1. $3.68 + $7.25
- Round $3.68 → $4 (0.68 > 0.5 → round up)
- Round $7.25 → $7 (0.25 < 0.5 → round down)
- Estimated sum: $4 + $7 = $11
- Actual sum: $3.68 + $7.25 = $10.93

#### 2. $4.59 + $6.78
- $4.59 → $5 (0.59 > 0.5 → round up)
- $6.78 → $7 (0.78 > 0.5 → round up)
- Estimated sum: $5 + $7 = $12
- Actual sum: $4.59 + $6.78 = $11.37

#### 3. $10.10 + $5.88
- $10.10 → $10 (0.10 < 0.5 → round down)
- $5.88 → $6 (0.88 > 0.5 → round up)
- Estimated sum: $10 + $6 = $16
- Actual sum: $10.10 + $5.88 = $15.98

#### 4. $2.91 + $3.22
- $2.91 → $3 (0.91 > 0.5 → round up)
- $3.22 → $3 (0.22 < 0.5 → round down)
- Estimated sum: $3 + $3 = $6
- Actual sum: $2.91 + $3.22 = $6.13

#### 5. $8.57 + $4.20
- $8.57 → $9 (0.57 > 0.5 → round up)
- $4.20 → $4 (0.20 < 0.5 → round down)
- Estimated sum: $9 + $4 = $13
- Actual sum: $8.57 + $4.20 = $12.77

#### 6. $6.01 + $2.77
- $6.01 → $6 (0.01 < 0.5 → round down)
- $2.77 → $3 (0.77 > 0.5 → round up)
- Estimated sum: $6 + $3 = $9
- Actual sum: $6.01 + $2.77 = $8.78

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✔ Part B: Estimate the difference. Then subtract.

#### 1. $15.97 – $11.80
- $15.97 → $16 (round up)
- $11.80 → $12 (round up)
- Estimated difference: $16 – $12 = $4
- Actual difference: $15.97 – $11.80 = $4.17

#### 2. $14.42 – $8.81
- $14.42 → $14 (0.42 < 0.5 → round down)
- $8.81 → $9 (0.81 > 0.5 → round up)
- Estimated difference: $14 – $9 = $5
- Actual difference: $14.42 – $8.81 = $5.61

#### 3. $16.39 + $8.52 → Wait! This says "difference", but it's addition.
> ✘ There's a typo here — this should be subtraction. Let's assume it's meant to be:
> $16.39 – $8.52
- $16.39 → $16 (0.39 < 0.5 → round down)
- $8.52 → $9 (0.52 > 0.5 → round up)
- Estimated difference: $16 – $9 = $7
- Actual difference: $16.39 – $8.52 = $7.87

#### 4. $20.01 – $12.10
- $20.01 → $20 (0.01 < 0.5 → round down)
- $12.10 → $12 (0.10 < 0.5 → round down)
- Estimated difference: $20 – $12 = $8
- Actual difference: $20.01 – $12.10 = $7.91

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✔ Summary Table

| Problem | Estimated Sum/Difference | Actual Answer |
|--------|----------------------------|----------------|
| 1. $3.68 + $7.25 | $11 | $10.93 |
| 2. $4.59 + $6.78 | $12 | $11.37 |
| 3. $10.10 + $5.88 | $16 | $15.98 |
| 4. $2.91 + $3.22 | $6 | $6.13 |
| 5. $8.57 + $4.20 | $13 | $12.77 |
| 6. $6.01 + $2.77 | $9 | $8.78 |
| 7. $15.97 – $11.80 | $4 | $4.17 |
| 8. $14.42 – $8.81 | $5 | $5.61 |
| 9. $16.39 – $8.52 | $7 | $7.87 |
| 10. $20.01 – $12.10 | $8 | $7.91 |

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📝 Key Concept:

- Rounding Rule: If the decimal part is 0.5 or more, round up; otherwise, round down.
- Estimation helps check if your final answer is reasonable.

Let me know if you'd like this formatted as a printable sheet or want help with any specific problem!