Mental Math activities are important because they provide a chance to

Options

A. develop mental computation procedures as the students try to identify the relationship between numbers for fast calculations
B. master procedures learnt in class using paper-pencil
C. master algorithms learnt and practice more number of problems in less time
D. develop their speed with accuracy for calculations and help to improve performance in examinations

Answer

To solve the question regarding the importance of mental math activities, we will analyze each option provided and determine which one best captures the essence of why mental math is beneficial.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks why mental math activities are important. We need to evaluate the given options to find the most appropriate reason.

2. **Analyzing Option A**:
- **Statement**: "Develop mental computation procedure as the students try to identify the relationship between the numbers for fast calculation."
- **Evaluation**: This option emphasizes the development of mental computation skills and understanding relationships between numbers, which is a key benefit of mental math. This option seems strong.

3. **Analyzing Option B**:
- **Statement**: "Master procedure learned in class to using paper pencil."
- **Evaluation**: This option focuses on mastering paper-and-pencil procedures, which is not the primary focus of mental math activities. Mental math is about performing calculations mentally, not just mastering written procedures. This option is not appropriate.

4. **Analyzing Option C**:
- **Statement**: "Master algorithms learned and practice more number of problems in less time."
- **Evaluation**: While practicing algorithms is important, this option does not specifically highlight the mental aspect of math. It also implies a focus on speed rather than understanding, which is less aligned with the core purpose of mental math.

5. **Analyzing Option D**:
- **Statement**: "Develop their speed with accuracy for calculation help to improve performance in the examination."
- **Evaluation**: This option does emphasize speed and accuracy, which are benefits of mental math. However, it does not capture the fundamental aspect of understanding relationships between numbers.

6. **Conclusion**: After analyzing all options, **Option A** is the most appropriate answer because it highlights the development of mental computation procedures and understanding relationships between numbers, which are key benefits of mental math activities.

### Final Answer:
**Option A**: Develop mental computation procedure as the students try to identify the relationship between the numbers for fast calculation.