Let’s solve the questions asked in the task step by step.
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Question 1: What is 11²?
This means: multiply 11 by itself.
So,
11 × 11 = ?
We can break it down:
11 × 10 = 110
11 × 1 = 11
Add them: 110 + 11 =
121
✔ So, 11² =
121
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Question 2: What about 12²?
That means: 12 × 12
Break it down:
12 × 10 = 120
12 × 2 = 24
Add them: 120 + 24 =
144
✔ So, 12² =
144
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Also, note that these are called “square numbers” because they represent the area of a square with side length equal to the number. For example:
- A square with side 3 has area 3×3=9 → so 9 is a square number.
- Similarly, 11×11=121 → area of a square with side 11.
- And 12×12=144 → area of a square with side 12.
The multiplication table in the image shows all products up to 10×10, and highlights the diagonal (where row = column) — those are the square numbers from 1² to 10².
But we’re being asked for 11² and 12², which are beyond the table — so we calculate them manually as above.
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Final Answer:
11² = 121
12² = 144
Parent Tip: Review the logic above to help your child master the concept of prime numbers up to 100 worksheet.
