Let's solve the problem step by step.
The worksheet is titled
"COUNT ON to add", which means we're supposed to use the
counting-on strategy to add numbers. In this method, you start with the larger number and count forward using the fingers shown in the pictures.
Each problem shows a number plus a hand showing some fingers (like 2, 3, 4, etc.), and we need to add them.
---
Problem 1:
17 + [hand showing 3 fingers] = ?
- Start at 17.
- Count on 3 more: 18, 19, 20.
- So,
17 + 3 = 20
✔ Answer:
20
---
Problem 2:
12 + [hand showing 2 fingers] = ?
- Start at 12.
- Count on 2 more: 13, 14.
- So,
12 + 2 = 14
✔ Answer:
14
---
Problem 3:
14 + [hand showing 1 finger] = ?
- Start at 14.
- Count on 1 more: 15.
- So,
14 + 1 = 15
✔ Answer:
15
---
Problem 4:
15 + [hand showing 4 fingers] = ?
- Start at 15.
- Count on 4 more: 16, 17, 18, 19.
- So,
15 + 4 = 19
✔ Answer:
19
---
Problem 5:
18 + [hand showing 2 fingers] = ?
- Start at 18.
- Count on 2 more: 19, 20.
- So,
18 + 2 = 20
✔ Answer:
20
---
Final Answers:
1. 17 + 3 =
20
2. 12 + 2 =
14
3. 14 + 1 =
15
4. 15 + 4 =
19
5. 18 + 2 =
20
---
Explanation:
This worksheet teaches
mental math using the
counting-on strategy, which is especially helpful for young learners. Instead of counting all from 1, they start from the larger number and just "count on" the amount shown on the hand. This builds number sense and efficiency in addition.
You can fill in the blanks as:
```
17 + 3 = 20
12 + 2 = 14
14 + 1 = 15
15 + 4 = 19
18 + 2 = 20
```
Parent Tip: Review the logic above to help your child master the concept of addition worksheet counting on.
