Multiplication Trick for 11

The video tutorial introduces a math trick for multiplying numbers by 11 without a calculator. It starts with simple two-digit examples and progresses to more complex numbers, demonstrating how to apply the trick efficiently. The method involves adding digits and carrying over when necessary, making it faster than using a calculator. The tutorial concludes with a complex example, reinforcing the simplicity and speed of the trick.

What is the main advantage of using the trick for multiplying by 11?

• It is only useful for small numbers.

• It only works for even numbers.

• It is faster than using a calculator.

• It requires no calculations.

How do you find the middle digit when multiplying a two-digit number by 11?

• Divide the larger digit by the smaller one.

• Add the two digits together.

• Multiply the digits together.

• Subtract the smaller digit from the larger one.

What is the result of 54 multiplied by 11 using the trick?

• 594

• 540

• 514

• 504

When using the trick on a number like 5434, what is the first step?

• Add all the digits together.

• Write down the first and last digits.

• Multiply the first digit by 11.

• Subtract the last digit from the first.

What is the result of 5434 multiplied by 11 using the trick?

• 57,774

• 5,434

• 54,340

• 59,774

How do you handle a sum that is greater than 9 when using the trick?

• Ignore the extra digit.

• Subtract 10 from the sum.

• Carry over the extra digit to the left.

• Add the extra digit to the right.

What is the result of 3224 multiplied by 11 using the trick?

• 35,464

• 32,240

• 33,224

• 34,264

In the example of 29, what do you do with the sum of 6 + 7?

• Ignore the 3.

• Write 13 as it is.

• Carry the 1 to the next column.

• Subtract 3 from 9.

What is the final result of 29 multiplied by 11 using the trick?

• 40,392

• 29,391

• 30,392

• 39,292

What is the key takeaway from practicing this multiplication trick?

• It only works for numbers less than 100.

• It requires memorizing complex formulas.

• It can be faster than using a calculator.

• It is only useful for math competitions.