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Looking at the worksheet, I need to solve problems 2 through 14 (since problem 1 is already done as an example).

For each problem, I must:
1. Round each number to the nearest ten
2. Multiply the rounded numbers to get the estimated product
3. Also calculate the actual product

Let me go through each one carefully:

Problem 2: 79 × 18
- Round 79 → 80 (nearest ten)
- Round 18 → 20 (nearest ten)
- Estimate: 80 × 20 = 1600
- Actual: 79 × 18 = 1422

Problem 3: 94 × 63
- Round 94 → 90 (nearest ten)
- Round 63 → 60 (nearest ten)
- Estimate: 90 × 60 = 5400
- Actual: 94 × 63 = 5922

Problem 4: 91 × 14
- Round 91 → 90 (nearest ten)
- Round 14 → 10 (nearest ten)
- Estimate: 90 × 10 = 900
- Actual: 91 × 14 = 1274

Problem 5: 71 × 12
- Round 71 → 70 (nearest ten)
- Round 12 → 10 (nearest ten)
- Estimate: 70 × 10 = 700
- Actual: 71 × 12 = 852

Problem 6: 65 × 74
- Round 65 → 70 (nearest ten)
- Round 74 → 70 (nearest ten)
- Estimate: 70 × 70 = 4900
- Actual: 65 × 74 = 4810

Problem 7: 85 × 76
- Round 85 → 90 (nearest ten)
- Round 76 → 80 (nearest ten)
- Estimate: 90 × 80 = 7200
- Actual: 85 × 76 = 6460

Problem 8: 84 × 55
- Round 84 → 80 (nearest ten)
- Round 55 → 60 (nearest ten)
- Estimate: 80 × 60 = 4800
- Actual: 84 × 55 = 4620

Problem 9: 41 × 83
- Round 41 → 40 (nearest ten)
- Round 83 → 80 (nearest ten)
- Estimate: 40 × 80 = 3200
- Actual: 41 × 83 = 3403

Problem 10: 11 × 48
- Round 11 → 10 (nearest ten)
- Round 48 → 50 (nearest ten)
- Estimate: 10 × 50 = 500
- Actual: 11 × 48 = 528

Problem 11: 28 × 17
- Round 28 → 30 (nearest ten)
- Round 17 → 20 (nearest ten)
- Estimate: 30 × 20 = 600
- Actual: 28 × 17 = 476

Problem 12: 42 × 67
- Round 42 → 40 (nearest ten)
- Round 67 → 70 (nearest ten)
- Estimate: 40 × 70 = 2800
- Actual: 42 × 67 = 2814

Problem 13: 47 × 82
- Round 47 → 50 (nearest ten)
- Round 82 → 80 (nearest ten)
- Estimate: 50 × 80 = 4000
- Actual: 47 × 82 = 3854

Problem 14: 86 × 81
- Round 86 → 90 (nearest ten)
- Round 81 → 80 (nearest ten)
- Estimate: 90 × 80 = 7200
- Actual: 86 × 81 = 6966

Now I'll present all answers in order from 2 to 14, showing both the estimated product and actual product for each.

Final Answer:
2) Estimate: 1600, Actual: 1422
3) Estimate: 5400, Actual: 5922
4) Estimate: 900, Actual: 1274
5) Estimate: 700, Actual: 852
6) Estimate: 4900, Actual: 4810
7) Estimate: 7200, Actual: 6460
8) Estimate: 4800, Actual: 4620
9) Estimate: 3200, Actual: 3403
10) Estimate: 500, Actual: 528
11) Estimate: 600, Actual: 476
12) Estimate: 2800, Actual: 2814
13) Estimate: 4000, Actual: 3854
14) Estimate: 7200, Actual: 6966