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What’s a shortcut for multiplying numbers by 11?
Updated: 11-Apr-2025

To multiply a two-digit number by 11, add the digits and place the sum between them. Example: 23 × 11 = 2 (2+3) 3 = 253. If the middle digit sums to 10 or more, carry the extra digit over. It's a handy mental trick for quick multiplications with 11.

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