Math worksheet for estimating products by rounding numbers to the nearest ten and hundred.

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

The goal is to round each whole number to the nearest ten and nearest hundred, then multiply the rounded numbers to estimate the product.

---

🔢 Rules for Rounding:

- Nearest Ten: Look at the ones digit.
- If it's 5 or more, round up.
- If it's less than 5, round down.

- Nearest Hundred: Look at the tens digit.
- If it's 50 or more, round up.
- If it's less than 50, round down.

---

We'll go through each problem one by one.

---

✔ Problem 1:

272 × 134

#### Round to Nearest Ten:
- 272 → look at ones digit: 2 → round down → 270
- 134 → ones digit: 4 → round down → 130

→ 270 × 130

#### Round to Nearest Hundred:
- 272 → tens digit: 70 → 70 ≥ 50 → round up → 300
- 134 → tens digit: 30 → 30 < 50 → round down → 100

→ 300 × 100

---

✔ Problem 2:

521 × 224

#### Nearest Ten:
- 521 → ones digit: 1 → round down → 520
- 224 → ones digit: 4 → round down → 220

→ 520 × 220

#### Nearest Hundred:
- 521 → tens digit: 20 → 20 < 50 → round down → 500
- 224 → tens digit: 20 → 20 < 50 → round down → 200

→ 500 × 200

---

✔ Problem 3:

797 × 251

#### Nearest Ten:
- 797 → ones digit: 7 → round up → 800
- 251 → ones digit: 1 → round down → 250

→ 800 × 250

#### Nearest Hundred:
- 797 → tens digit: 90 → 90 ≥ 50 → round up → 800
- 251 → tens digit: 50 → 50 ≥ 50 → round up → 300

→ 800 × 300

---

✔ Problem 4:

662 × 561

#### Nearest Ten:
- 662 → ones digit: 2 → round down → 660
- 561 → ones digit: 1 → round down → 560

→ 660 × 560

#### Nearest Hundred:
- 662 → tens digit: 60 → 60 ≥ 50 → round up → 700
- 561 → tens digit: 60 → 60 ≥ 50 → round up → 600

→ 700 × 600

---

✔ Problem 5:

491 × 231

#### Nearest Ten:
- 491 → ones digit: 1 → round down → 490
- 231 → ones digit: 1 → round down → 230

→ 490 × 230

#### Nearest Hundred:
- 491 → tens digit: 90 → 90 ≥ 50 → round up → 500
- 231 → tens digit: 30 → 30 < 50 → round down → 200

→ 500 × 200

---

✔ Final Answer Table:

| Question | Nearest Ten | Nearest Hundred |
|--------------|-------------------|---------------------|
| 272 × 134 | 270 × 130 | 300 × 100 |
| 521 × 224 | 520 × 220 | 500 × 200 |
| 797 × 251 | 800 × 250 | 800 × 300 |
| 662 × 561 | 660 × 560 | 700 × 600 |
| 491 × 231 | 490 × 230 | 500 × 200 |

---

📝 Notes:

- These are estimations, so we're not calculating the exact product, just approximating using rounded numbers.
- This method helps quickly estimate how big a product will be without doing full multiplication.

Let me know if you'd like the estimated products calculated too!