Fast Mental Multiplication Trick - Multiply in your head using base 20 and 30
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Fast Mental Multiplication Trick - Multiply in your head numbers near 50
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x/4 + 8/x = 3 This Algebra Equation is NOT so simple!
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How to Calculate Faster than a Calculator - Mental Math #1
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Multiplication trick using estimation
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75% will get WRONG: (zero to 2nd power) – (zero to zero power) = ? NO CALCULATOR
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07 - Mental Math Secrets! - Rapidly Multiply 2-Digit Numbers! Fast Mental Calculation Tricks
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Mental Multiplication Math Trick - Multiply numbers in your head near 100
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