Calculate 11 Squared: Finding the Value of 11²

Squaring Numbers with Mental Math Patterns

112= 11^2=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Break down from exponent to multiplication
00:06 Be sure to multiply numerator by numerator and denominator by denominator
00:09 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

112= 11^2=

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Set up the multiplication as 11×11 11 \times 11 .
  • Step 2: Compute the product using basic arithmetic.
  • Step 3: Compare the result with the provided multiple-choice answers to identify the correct one.

Now, let's work through each step:
Step 1: We begin with the calculation 11×11 11 \times 11 .
Step 2: Perform the multiplication:

  1. Multiply the units digits: 1×1=1 1 \times 1 = 1 .
  2. Next, for the tens digits: 11×10=110 11 \times 10 = 110 .
  3. Add the results: 110+1=111 110 + 1 = 111 . This doesn't seem right, so let's break it down further.

Let's examine a more structured multiplication method:

Multiply 11 11 by 1 1 (last digit of the second 11), we get 11.
Multiply 11 11 by 10 10 (tens place of the second 11), we get 110.

If we align correctly and add the partial products:

11
+ 110
------------
121

Step 3: The correct multiplication yields the final result as 121 121 . Upon reviewing the provided choices, the correct answer is choice 4: 121 121 .

Therefore, the solution to the problem is 121 121 .

3

Final Answer

121

Key Points to Remember

Essential concepts to master this topic
  • Definition: Exponent notation means multiply the base by itself
  • Technique: Use 11×11 11 \times 11 to calculate 112=121 11^2 = 121
  • Check: Verify that 121 ends in 1 (since 1×1=1) ✓

Common Mistakes

Avoid these frequent errors
  • Confusing exponents with multiplication by the exponent
    Don't calculate 11² as 11 × 2 = 22! This treats the exponent like regular multiplication instead of repeated multiplication. Always remember that 11² means 11 × 11, not 11 × 2.

Practice Quiz

Test your knowledge with interactive questions

\( 11^2= \)

FAQ

Everything you need to know about this question

What's the difference between 11² and 11 × 2?

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11² means 11 × 11 = 121, while 11 × 2 = 22. The small 2 above (exponent) tells you how many times to multiply 11 by itself, not what to multiply 11 by!

Is there a shortcut for squaring numbers ending in 1?

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Yes! For numbers ending in 1, the square always ends in 1. For example: 12=1 1^2 = 1 , 112=121 11^2 = 121 , 212=441 21^2 = 441 . This can help you check your answer!

How do I multiply 11 × 11 without a calculator?

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  • Method 1: 11 × 11 = 11 × 10 + 11 × 1 = 110 + 11 = 121
  • Method 2: Write it vertically and add the partial products
  • Method 3: Remember that 112=121 11^2 = 121 is a common square to memorize!

Why is 121 the right answer and not 111?

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Let's check: 11×11 11 \times 11 gives us 1 × 1 = 1 in the ones place, plus 1 × 1 = 1 carried over twice, making 121. If you got 111, you might have added instead of multiplying!

What does the ² symbol actually mean?

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The ² is called an exponent and means "squared" or "to the second power." It tells you to multiply the number by itself exactly once: 112=11×11 11^2 = 11 \times 11 .

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