Math Shortcuts: Multiplying a 2-Digit Number by 11

The first digit of number being multiplied by 11 is the first digit (hundreds) of the answer. 

The last digit of the number being multiplied by 11 is the last digit (ones) of the answer.

The sum of the tens digit and the units digit of the number will give the tens digit of the answer. If the sum is greater than or equal to 10, add one to the hundreds digit.

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For example: 43 x 11 = __________ 

The first digit of the answer is: 4

The center digit is 4+3. That is: 7

The ones digit is:
3

Therefore, the product of 43 and 11 is 473.

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Now, can you apply what you learned here to work three- or more-digit numbers times 11?