It looks like you've shared an image of a
second-grade math problem-solving resource titled *"Math Problem-Solving: Second Grade"*, which includes:
- 18 worksheets
- A PowerPoint lesson plan
- Focus on
part-part-whole math problems
Let me solve and explain the two sample problems shown in the image.
---
🔹 Problem 1 (Left Side):
> *Sally had 15 goldfish. When her friend Sarah came to visit, she asked if she could take 4 fish home with her. How many fish did Sally have left?*
####
✔ Step-by-step Solution:
We are given:
- Total number of fish Sally originally had:
15
- Number of fish taken by Sarah:
4
We need to find how many fish are
left.
This is a
subtraction problem:
\[
15 - 4 = 11
\]
✔ Answer: Sally has
11 fish left.
#### 🧠 Strategy Used:
-
Part-Part-Whole Model: The whole (15) is split into two parts — one part is taken away (4), and we find the remaining part.
- This reinforces understanding of subtraction as "taking away."
---
🔹 Problem 2 (Right Side):
> *There are 9 ducks swimming in a pond. 4 ducks swim away. How many ducks are left in the pond?*
####
✔ Step-by-step Solution:
Given:
- Total ducks at start:
9
- Ducks that swam away:
4
Again, this is a subtraction problem:
\[
9 - 4 = 5
\]
✔ Answer: There are
5 ducks left in the pond.
#### 🧠 Strategy Used:
- Visual model: The top box shows 9 ducks (the whole).
- One part (4 ducks) is removed.
- We subtract to find the other part (5 ducks).
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📚 Teaching Approach (from the image):
The worksheets use:
-
Visual models (like drawings of fish and ducks)
-
Part-Part-Whole diagrams to help students visualize the relationship between numbers
-
Step-by-step prompts such as “Draw the problem” and “Write the equation”
- Hands-on tools like crayons, scissors, and notebooks suggest interactive learning
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💡 Why This Works for Second Grade:
- Builds
number sense and
problem-solving skills
- Reinforces
subtraction within 20, which is a key second-grade standard
- Uses
real-life scenarios (goldfish, ducks) to make math relatable
- Encourages
visual representation and
written explanations
---
✔ Summary:
| Problem | Given | Operation | Answer |
|--------|-------|-----------|--------|
| 1 | 15 fish, 4 taken | 15 – 4 | 11 fish left |
| 2 | 9 ducks, 4 leave | 9 – 4 | 5 ducks left |
These problems are excellent examples of
word problems using subtraction, aligned with
Common Core Math Standards for Grade 2 (e.g., 2.OA.A.1).
If you'd like, I can generate a printable version of these worksheets or create similar problems!
Parent Tip: Review the logic above to help your child master the concept of second grade problem solving worksheet.
