It looks like you've uploaded a worksheet titled
"Estimate the Product", which asks students to:
-
Round the first factor (the number on the left) to the nearest ten or hundred.
- Use
mental math to estimate the product of two numbers.
Let’s go through how to solve this type of problem and then walk through a few examples from the worksheet.
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🔍 Instructions Recap:
1. Round the
first factor to the nearest ten or hundred.
2. Multiply the rounded number by the second factor.
3. Write your estimated product.
> Example given:
> `75 × 4` → Round 75 to
80 → Estimate: `80 × 4 = 320`
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✔ Step-by-Step Solution Guide
For each problem:
1. Identify the
first number (e.g., 47 in "47 × 7").
2. Round it to the nearest
ten (or hundred if needed).
3. Multiply the rounded number by the second factor.
4. Write the estimated product.
Let’s solve a few of them:
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📌 Problem 1: `47 × 7`
- Round 47 →
50
- Estimate: `50 × 7 = 350`
✔ Answer:
350
---
📌 Problem 2: `55 × 6`
- Round 55 →
60
- Estimate: `60 × 6 = 360`
✔ Answer:
360
---
📌 Problem 3: `68 × 5`
- Round 68 →
70
- Estimate: `70 × 5 = 350`
✔ Answer:
350
---
📌 Problem 4: `25 × 9`
- Round 25 →
30
- Estimate: `30 × 9 = 270`
✔ Answer:
270
---
📌 Problem 5: `92 × 3`
- Round 92 →
90
- Estimate: `90 × 3 = 270`
✔ Answer:
270
---
📌 Problem 6: `42 × 4`
- Round 42 →
40
- Estimate: `40 × 4 = 160`
✔ Answer:
160
---
📌 Problem 7: `64 × 9`
- Round 64 →
60
- Estimate: `60 × 9 = 540`
✔ Answer:
540
---
📌 Problem 8: `36 × 4`
- Round 36 →
40
- Estimate: `40 × 4 = 160`
✔ Answer:
160
---
📌 Problem 9: `81 × 6`
- Round 81 →
80
- Estimate: `80 × 6 = 480`
✔ Answer:
480
---
📌 Problem 10: `52 × 8`
- Round 52 →
50
- Estimate: `50 × 8 = 400`
✔ Answer:
400
---
📌 Problem 11: `44 × 3`
- Round 44 →
40
- Estimate: `40 × 3 = 120`
✔ Answer:
120
---
📌 Problem 12: `38 × 5`
- Round 38 →
40
- Estimate: `40 × 5 = 200`
✔ Answer:
200
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✔ Final Answers Summary:
| Problem | Rounded First Factor | Estimate |
|--------|------------------------|---------|
| 47 × 7 | 50 | 350 |
| 55 × 6 | 60 | 360 |
| 68 × 5 | 70 | 350 |
| 25 × 9 | 30 | 270 |
| 92 × 3 | 90 | 270 |
| 42 × 4 | 40 | 160 |
| 64 × 9 | 60 | 540 |
| 36 × 4 | 40 | 160 |
| 81 × 6 | 80 | 480 |
| 52 × 8 | 50 | 400 |
| 44 × 3 | 40 | 120 |
| 38 × 5 | 40 | 200 |
---
💡 Tips:
- Always round the
first factor (left number), unless otherwise instructed.
- Use rounding rules:
- If the digit is 5 or more, round up.
- If less than 5, round down.
- Mental math makes this fast — just multiply the rounded number by the second number.
Let me know if you’d like this as a printable answer key or want help with any specific problem!
Parent Tip: Review the logic above to help your child master the concept of estimate products worksheet.
