Multiplying Two-Digit Numbers by 11

The video tutorial demonstrates a simple trick for multiplying two-digit numbers by 11. It starts with the example of 24, where you split the digits, add them, and place the sum in between to get the result. The same method is applied to 56, with an adjustment for carrying over when the sum exceeds 9. This technique is effective for any two-digit number multiplied by 11.

What is the first step in the trick for multiplying a two-digit number by 11?

• Subtract 1 from the number

• Add 11 to the number

• Split the number into two parts

• Multiply the number by 10

When using the trick on 24, what is the sum of its digits?

• 6

• 5

• 7

• 4

How do you handle the sum of digits when it exceeds 9, as in the case of 56?

• Ignore the extra digit

• Add the extra digit to the first digit of the number

• Subtract the extra digit from the total

• Multiply the extra digit by 2

What is the result of multiplying 56 by 11 using the trick?

• 5610

• 561

• 6160

• 616

For which type of numbers does this multiplication trick work effectively?

• Four-digit numbers

• Three-digit numbers

• Two-digit numbers

• Single-digit numbers