Multiplying by 11 Techniques

The video tutorial explains how to multiply numbers by 11 using a simple method. It involves finding the sum of the digits of the number being multiplied by 11 and placing this sum between the original digits. The tutorial provides examples with numbers like 26, 52, 87, and 94, demonstrating how to handle cases where the sum of the digits results in a two-digit number. Advanced techniques are also discussed for handling such cases, ensuring accurate results.

What is the first step in multiplying a number by 11?

• Multiply the number by 10 and add 1

• Subtract 1 from the number

• Double the number

• Find the sum of the digits of the number

In the example of 26 times 11, what is the middle digit of the product?

• 4

• 8

• 2

• 6

For 52 times 11, what is the resulting product?

• 572

• 512

• 562

• 532

When multiplying 87 by 11, what adjustment is made to the middle digit?

• Double the middle digit

• Record the 5 and carry over 1

• Add 1 to the middle digit

• Subtract 1 from the middle digit

In the example of 94 times 11, what is the final product?

• 1034

• 934

• 943

• 1043