Multiplying by 11 Shortcuts

The video tutorial demonstrates shortcuts for multiplying numbers by 11. It begins with a method for multiplying 11 by 12, which involves splitting and adding numbers. The tutorial then covers multiplying 11 by 99 using a similar technique. Finally, it briefly explains straightforward multiplication of 11 by 6 and 7, emphasizing the simplicity of these calculations.

What is the shortcut for multiplying 11 by 12?

• Add 11 to 12 and multiply by 2

• Split 12 and add the numbers in between

• Multiply 11 by 11 and add 1

• Multiply 11 by 10 and add 2

How do you calculate 11 times 99 using the shortcut?

• Multiply 11 by 90 and add 9

• Multiply 11 by 100 and subtract 1

• Add 11 to 99 and subtract 10

• Split 99, add the numbers, and adjust

What is the result of 11 times 6 using the shortcut?

• 68

• 72

• 60

• 66

What is the result of 11 times 7 using the shortcut?

• 79

• 74

• 77

• 70

Which of the following is a correct shortcut for multiplying by 11?

• Add 10 to the number

• Double the number

• Split the number and add the digits

• Subtract 1 from the number