Useful math hacks they didn’t teach you in school
- Multiply by 11: If you are asked to multiply a specific amount by 11 then you must follow a certain rule to make a calculation easy for you like if you are having the number 35 by considering both numbers different as 3 and 5 and addition of these numbers is written in mid of these two numbers that is 8 so the answer for 35 multiply by 11 is 385.
via WonderHowTo
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