Let’s solve each problem step by step using the visual “seashell math” method shown in the worksheet. The key idea is:
-
Even numbers can be perfectly paired up — no seashell left alone.
-
Odd numbers have
one seashell leftover after pairing.
We’ll calculate the sum of each addition problem and then check if the total number of seashells can be paired (even) or has one left over (odd).
---
🔹 Problem 1: 5 + 3
- Total = 5 + 3 =
8
- Look at the image: There are 8 seashells (5 yellow, 3 blue).
- Can we pair them all? Yes — 4 pairs →
no leftover.
✔ So,
8 is Even
✔️ Check the
“Even” box.
---
🔹 Problem 2: 6 + 1
- Total = 6 + 1 =
7
- Image shows 7 seashells (6 blue, 1 pink).
- Try to pair them: 3 pairs = 6 seashells → 1 leftover.
✔ So,
7 is Odd
✔️ Check the
“Odd” box.
---
🔹 Problem 3: 12 + 2
- Total = 12 + 2 =
14
- Image shows 14 seashells (12 pink coral, 2 yellow shells).
- 14 ÷ 2 = 7 → perfect pairs →
no leftover.
✔ So,
14 is Even
✔️ Check the
“Even” box.
---
🔹 Problem 4: 10 + 3
- Total = 10 + 3 =
13
- Image shows 13 seashells (10 purple, 3 green).
- 13 ÷ 2 = 6 pairs (12 seashells) → 1 leftover.
✔ So,
13 is Odd
✔️ Check the
“Odd” box.
---
##
✔ Final Answers:
| Problem | Sum | Answer |
|---------|-----|------------|
| 5 + 3 | 8 |
Even |
| 6 + 1 | 7 |
Odd |
| 12 + 2 | 14 |
Even |
| 10 + 3 | 13 |
Odd |
---
## 🎯 Summary:
You can also remember this rule:
> -
Even + Even = Even
> -
Odd + Odd = Even
> -
Even + Odd = Odd
Check:
- 5 (Odd) + 3 (Odd) = 8 (Even) → ✔️
- 6 (Even) + 1 (Odd) = 7 (Odd) → ✔️
- 12 (Even) + 2 (Even) = 14 (Even) → ✔️
- 10 (Even) + 3 (Odd) = 13 (Odd) → ✔️
All correct!
---
✔ So, on your worksheet, you should mark:
-
5+3 → Even
-
6+1 → Odd
-
12+2 → Even
-
10+3 → Odd
Great job using the seashell pairing strategy! 🐚
Parent Tip: Review the logic above to help your child master the concept of odd and even number worksheet for 2nd grade.
