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Great! Let's dive into each problem type one by one and explore them further. | |
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📌 **Problem 1: Missing Value Problem** | |
**Problem:** | |
*"The scale on a map is 2 cm represents 25 miles. If a given measurement on the map is 24 cm, how many miles are represented?"* | |
### **Solution Strategy:** | |
1️⃣ **Understand the Scale:** | |
- You know that **2 cm** on the map corresponds to **25 miles** in reality. | |
2️⃣ **Set Up a Proportion:** | |
$$ | |
\frac{2 \,\text{cm}}{25 \,\text{miles}} = \frac{24 \,\text{cm}}{x \,\text{miles}} | |
$$ | |
3️⃣ **Cross-Multiply and Solve:** | |
$$ | |
2x = 24 \times 25 | |
$$ | |
4️⃣ **Calculate:** | |
$$ | |
x = \frac{24 \times 25}{2} = 300 \text{ miles} | |
$$ | |
**Conclusion:** *24 cm on the map represents **300 miles**.* | |
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📌 **Problem 2: Numerical Comparison Problem** | |
**Problem:** | |
*"Ali and Ahmet purchased pencils. Ali bought **10 pencils for $3.50**, and Ahmet purchased **5 pencils for $1.80**. Who got the better deal?"* | |
### **Solution Strategy:** | |
1️⃣ **Calculate the Unit Price for Each:** | |
$$ | |
\text{Cost per pencil for Ali} = \frac{\$3.50}{10} = \$0.35 | |
$$ | |
$$ | |
\text{Cost per pencil for Ahmet} = \frac{\$1.80}{5} = \$0.36 | |
$$ | |
2️⃣ **Compare the Unit Prices:** | |
- **Ali pays \$0.35 per pencil** | |
- **Ahmet pays \$0.36 per pencil** | |
3️⃣ **Conclusion:** *Ali got the better deal because he paid **less per pencil**.* | |
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📌 **Problem 3: Qualitative Reasoning Problem** | |
**Problem:** | |
*"Kim is mixing paint. Yesterday, she combined **red and white paint** in a certain ratio. Today, she used **more red paint** but kept the **same amount of white paint**. How will today’s mixture compare to yesterday’s in color?"* | |
### **Solution Strategy:** | |
1️⃣ **Understand the Change in Ratios:** | |
- Today, the **amount of red paint has increased**, while **white paint remains constant**. | |
2️⃣ **Qualitative Analysis:** | |
- Since **the proportion of red paint has increased**, today's mixture will be **more red (darker)** compared to yesterday. | |
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💬 **Discussion:** | |
✔ **Which problem do you want to start with?** | |
✔ **What is the first strategy that comes to your mind for solving it?** | |
✔ **Would you like a hint before starting?** | |
Feel free to ask for guidance or clarification on any of the problems! | |