MentalMaths

Ever wanted to become a human calculator? No? well at least these videos will help you to do your maths in class then. The videos below will help you to calculate quicker and easier without the need of a calculator.
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 * Multiplying by 11** ||= media type="youtube" key="l6EAwIMXCoQ" height="344" width="425"
 * Multiplying by 9** ||
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 * Mutiplying large numbers by 5** ||= media type="youtube" key="Mti6p9vDwvU" height="344" width="425"
 * Squaring any 2 digit numbers** ||
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 * Finding Percentages in Your Head** ||= media type="youtube" key="Yws_Re5nlcM" height="344" width="425"
 * Adding Large Numbers** ||