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All questions of Multiplication for Class 1 Exam

What is 21 times 8?
  • a)
    162
  • b)
    166
  • c)
    168
  • d)
    172
Correct answer is option 'C'. Can you explain this answer?

Muskaan reddy answered
Multiplication Basics
Multiplication is a fundamental arithmetic operation that combines groups of equal sizes. In this case, we need to find the product of 21 and 8.
Step-by-Step Calculation
- Understanding the Problem:
- We want to calculate 21 groups of 8.
- Breaking it Down:
- You can visualize this by splitting 21 into smaller parts for easier calculation.
- For example: 21 can be broken into 20 and 1.
- Calculating Each Part:
- 20 times 8:
- 20 * 8 = 160
- 1 times 8:
- 1 * 8 = 8
- Adding the Results:
- Now, add the two results together:
- 160 + 8 = 168
Final Answer
Thus, 21 times 8 equals 168. Therefore, the correct answer is option 'C'.
Visualizing the Result
- Option A: 162 (Incorrect)
- Option B: 166 (Incorrect)
- Option C: 168 (Correct)
- Option D: 172 (Incorrect)
By following this calculation method, you can confidently understand how to multiply larger numbers by breaking them down into manageable parts.

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