Yes, there are specific strategies for attempting numerical or calculation-based questions in Commerce. Here are some strategies that can help you:

1. Understand the question: Read the question carefully and make sure you understand what is being asked. Identify the key information and any given data or formulas.

2. Plan your approach: Before jumping into calculations, plan your approach. Break down the problem into smaller steps and determine the appropriate method or formula to use.

3. Show your workings: It is important to show all your workings, even if you make a mistake. This will help you get partial credit and allow you to review your steps if needed.

4. Use estimation: If the question involves complex calculations, use estimation techniques to get a rough idea of the answer. This can help you check if your final answer is reasonable.

5. Practice mental math: Improve your mental math skills by practicing calculations without using a calculator. This can save time and improve accuracy.

6. Use shortcuts or tricks: Look for shortcuts or tricks that can simplify calculations. For example, using percentage increase or decrease formulas, or using ratios to solve proportion problems.

7. Double-check your answer: Once you have completed the calculations, double-check your answer to ensure accuracy. Re-read the question to make sure you have answered everything correctly.

8. Time management: Manage your time effectively during exams. If you are stuck on a difficult calculation, skip it and come back to it later. Focus on the questions you can solve quickly to maximize your score.

Remember, practicing numerical and calculation-based questions regularly will improve your speed and accuracy.