Final Answer:
1. 24
2. 10 (but not listed — closest is 11) → actually, best estimate among options is
10, but since 10 isn’t an option, and 4 × 2.6 = 10.4, the closest given choice is
11
Wait — let’s recalculate carefully using estimation as asked (not exact value), and pick the *best estimate* from the given choices.
Let’s go one by one:
1. 12 × 1.4
→ 1.4 is close to 1.5, and 12 × 1.5 = 18 — but that’s not an option.
Better: round 1.4 → 1, so 12 × 1 = 12. But 1.4 is a bit more than 1, so answer should be a bit more than 12.
Options: 12, 24, 13, 14
Exact: 12 × 1.4 = 16.8 → none match closely? Wait—maybe they expect rounding 1.4 → 1, but 16.8 is closer to 17, not listed. Hmm.
But wait — maybe the task expects *quick mental estimation*:
- 12 × 1.4 ≈ 12 × 1 + 12 × 0.4 = 12 + 4.8 = 16.8 → nearest listed is
14? No, 13 or 14 — 16.8 is closer to 17, but not there.
Hold on — perhaps I misread. Let me compute each exactly and see which option is closest:
1. 12 × 1.4 =
16.8
Options: 12 (diff 4.8), 24 (7.2), 13 (3.8), 14 (2.8) →
14 is closest.
2. 4 × 2.6 =
10.4
Options: 11 (0.6 away), 12 (1.6), 9 (1.4), 8 (2.4) →
11 is closest.
3. 8 × 3.9 =
31.2
Options: 33 (1.8), 30 (1.2), 31 (0.2), 32 (0.8) →
31 is closest.
4. 9 × 8.1 =
72.9
Options: 70 (2.9), 71 (1.9), 72 (0.9), 80 (7.1) →
72 is closest.
5. 7 × 7.1 =
49.7
Options: 49 (0.7), 48 (1.7), 41 (8.7), 50 (0.3) →
50 is closest (only 0.3 away).
So best estimates from options:
1. 14
2. 11
3. 31
4. 72
5. 50
Final Answer:
14, 11, 31, 72, 50
Parent Tip: Review the logic above to help your child master the concept of estimating decimals worksheet.
