Let's solve the "Spot the doubles" worksheet step by step. The goal is to
determine the missing number in each addition problem so that both addends are the same (i.e., a "double"), and then write the total.
Each problem has the format:
`_ + _ = __`
with a hint like "double 3 = ___".
We’ll go through each one:
---
1. `3 + 3 = 6`
- Double 3 means 3 + 3.
- 3 + 3 =
6
✔ Already filled in correctly.
---
2. `4 + 4 = ?`
- Double 4 = 4 + 4
- 4 + 4 =
8
✔ So, fill in: `4 + 4 = 8`
---
3. `1 + 1 = ?`
- Double 1 = 1 + 1
- 1 + 1 =
2
✔ So, `1 + 1 = 2`
---
4. `2 + 2 = ?`
- Double 2 = 2 + 2
- 2 + 2 =
4
✔ So, `2 + 2 = 4`
---
5. `6 + 6 = ?`
- Double 6 = 6 + 6
- 6 + 6 =
12
✔ So, `6 + 6 = 12`
---
6. `5 + 5 = ?`
- Double 5 = 5 + 5
- 5 + 5 =
10
✔ So, `5 + 5 = 10`
---
7. `2 + 2 = ?`
- Same as #4
- 2 + 2 =
4
✔ So, `2 + 2 = 4`
---
8. `10 + 10 = ?`
- Double 10 = 10 + 10
- 10 + 10 =
20
✔ So, `10 + 10 = 20`
---
Final Answers:
| Problem | Answer |
|--------|--------|
| 3 + 3 = 6 |
✔ 6 |
| 4 + 4 = ? |
8 |
| 1 + 1 = ? |
2 |
| 2 + 2 = ? |
4 |
| 6 + 6 = ? |
12 |
| 5 + 5 = ? |
10 |
| 2 + 2 = ? |
4 |
| 10 + 10 = ? |
20 |
---
Summary of Missing Numbers:
- 4 + 4 =
8
- 1 + 1 =
2
- 2 + 2 =
4
- 6 + 6 =
12
- 5 + 5 =
10
- 2 + 2 =
4
- 10 + 10 =
20
---
Explanation:
This activity teaches
doubles facts, which are foundational for mental math. Recognizing that adding a number to itself (like 5 + 5) gives twice the value helps build fluency in addition.
For example:
- Double 3 = 6 → 3 × 2 = 6
- Double 10 = 20 → 10 × 2 = 20
So, students learn both addition and multiplication concepts simultaneously.
✔ All answers are now complete!
Parent Tip: Review the logic above to help your child master the concept of doubles math worksheet.
