https://file.aiquickdraw.com/mathbot/file/17285173860313v8ylxgf.jpg

Let's work through the calculations step-by-step:

### Problem Statements:
1. **A = (-3,2) × (-10) × (+2) × (-0,5)**
2. **B = (-75) × (-0,25) × (+4) × (+2)**
3. **C = (-3) × (-0,1) × (+5) × (+4)**
4. **D = (-1,5) × (+4) × (-1) × (+0,8) × (-3)**
5. **E = (+2) × (-10) × (+3) × (-1) × (-1)**

### Solutions:
1. **A = (-3,2) × (-10) × (+2) × (-0,5)**  
   - Step 1: \((-3,2) × (-10) = 32\)  
   - Step 2: \(32 × 2 = 64\)  
   - Step 3: \(64 × (-0,5) = -32\)  
   **Final Answer for A: -32**

2. **B = (-75) × (-0,25) × (+4) × (+2)**  
   - Step 1: \((-75) × (-0,25) = 18,75\)  
   - Step 2: \(18,75 × 4 = 75\)  
   - Step 3: \(75 × 2 = 150\)  
   **Final Answer for B: 150**

3. **C = (-3) × (-0,1) × (+5) × (+4)**  
   - Step 1: \((-3) × (-0,1) = 0,3\)  
   - Step 2: \(0,3 × 5 = 1,5\)  
   - Step 3: \(1,5 × 4 = 6\)  
   **Final Answer for C: 6**

4. **D = (-1,5) × (+4) × (-1) × (+0,8) × (-3)**  
   - Step 1: \((-1,5) × 4 = -6\)  
   - Step 2: \(-6 × (-1) = 6\)  
   - Step 3: \(6 × 0,8 = 4,8\)  
   - Step 4: \(4,8 × (-3) = -14,4\)  
   **Final Answer for D: -14,4**

5. **E = (+2) × (-10) × (+3) × (-1) × (-1)**  
   - Step 1: \(2 × (-10) = -20\)  
   - Step 2: \(-20 × 3 = -60\)  
   - Step 3: \(-60 × (-1) = 60\)  
   - Step 4: \(60 × (-1) = -60\)  
   **Final Answer for E: -60**

Let me know if you need a detailed breakdown for any of the calculations, and feel free to ask more questions!

### Follow-Up Questions:
1. How do negative numbers affect multiplication?
2. What happens when you multiply a number by 0.5?
3. Why does multiplying by a negative number change the sign of a product?
4. What is the impact of multiplying several negative numbers together?
5. How do decimals interact with negative numbers in multiplication?

### Tip:
Always track the sign (positive or negative) carefully during multiplication to avoid errors in determining the final result.

Effectue les calculs suivants : A = (-3,2) × (-10) × (+2) × (-0,5), B = (-75) × (-0,25) × (+4) × (+2), C = (-3) × (-0,1) × (+5) × (+4), D = (-1,5) × (+4) × (-1) × (+0,8) × (-3), E = (+2) × (-10) × (+3) × (-1) × (-1)

Learn how to solve multiplication problems with real numbers that include decimals and negative signs. We break down the step-by-step solutions for calculations like A = (-3.2) × (-10) × (+2) × (-0.5) and others. Suitable for students in Grades 7-9.

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