Odd and Even Numbers worksheet for Year 4 students, focusing on number and place value.

Sure! Let’s solve this Year 4 - Odd and Even Numbers (A) worksheet step by step.

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## 🎯 Goal:
For each calculation, estimate whether the answer will be odd or even, then check by actually solving the problem.

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## 🔢 Key Rules for Odd/Even Estimation:

- Even + Even = Even
- Odd + Odd = Even
- Even + Odd = Odd
- Even – Even = Even
- Odd – Odd = Even
- Even – Odd = Odd
- Odd – Even = Odd
- Even × Any = Even
- Odd × Odd = Odd

> 💡 Tip: You only need to look at the last digit of each number to determine if it's odd or even.

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Let’s go row by row:

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a) 36 + 32 =

- Estimate: 36 (even) + 32 (even) → even
- Check: 36 + 32 = 68 → even ✔

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b) 24 + 42 =

- Estimate: 24 (even) + 42 (even) → even
- Check: 24 + 42 = 66 → even ✔

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c) 96 – 24 =

- Estimate: 96 (even) – 24 (even) → even
- Check: 96 – 24 = 72 → even ✔

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d) 54 – 22 =

- Estimate: 54 (even) – 22 (even) → even
- Check: 54 – 22 = 32 → even ✔

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e) 65 + 21 =

- Estimate: 65 (odd) + 21 (odd) → even
- Check: 65 + 21 = 86 → even ✔

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f) 37 + 53 =

- Estimate: 37 (odd) + 53 (odd) → even
- Check: 37 + 53 = 90 → even ✔

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g) 75 – 23 =

- Estimate: 75 (odd) – 23 (odd) → even
- Check: 75 – 23 = 52 → even ✔

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h) 49 – 17 =

- Estimate: 49 (odd) – 17 (odd) → even
- Check: 49 – 17 = 32 → even ✔

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i) 86 + 13 =

- Estimate: 86 (even) + 13 (odd) → odd
- Check: 86 + 13 = 99 → odd ✔

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j) 72 + 43 =

- Estimate: 72 (even) + 43 (odd) → odd
- Check: 72 + 43 = 115 → odd ✔

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k) 68 – 15 =

- Estimate: 68 (even) – 15 (odd) → odd
- Check: 68 – 15 = 53 → odd ✔

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l) 48 – 21 =

- Estimate: 48 (even) – 21 (odd) → odd
- Check: 48 – 21 = 27 → odd ✔

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m) 8 × 2 =

- Estimate: 8 (even) × 2 (even) → even
- Check: 8 × 2 = 16 → even ✔

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n) 6 × 5 =

- Estimate: 6 (even) × 5 (odd) → even
- Check: 6 × 5 = 30 → even ✔

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o) 3 × 4 =

- Estimate: 3 (odd) × 4 (even) → even
- Check: 3 × 4 = 12 → even ✔

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p) 9 × 3 =

- Estimate: 9 (odd) × 3 (odd) → odd
- Check: 9 × 3 = 27 → odd ✔

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## ✔ Final Answer Summary Table:

| Problem | Estimate | Check (Answer) |
|---------|----------|----------------|
| a) 36+32 | even | 68 (even) |
| b) 24+42 | even | 66 (even) |
| c) 96–24 | even | 72 (even) |
| d) 54–22 | even | 32 (even) |
| e) 65+21 | even | 86 (even) |
| f) 37+53 | even | 90 (even) |
| g) 75–23 | even | 52 (even) |
| h) 49–17 | even | 32 (even) |
| i) 86+13 | odd | 99 (odd) |
| j) 72+43 | odd | 115 (odd) |
| k) 68–15 | odd | 53 (odd) |
| l) 48–21 | odd | 27 (odd) |
| m) 8×2 | even | 16 (even) |
| n) 6×5 | even | 30 (even) |
| o) 3×4 | even | 12 (even) |
| p) 9×3 | odd | 27 (odd) |

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✔ All estimates are correct based on odd/even rules!

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## 📝 Teaching Tip:
This exercise helps students understand number properties before calculating. It builds mental math and reasoning skills — very important in Year 4!

Let me know if you’d like a printable version or explanation for younger learners! 😊