Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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I found an easy to follow video tutorial of the above mentioned speed multiplication with 11 . The website below has other amazing tricks of faster mental math as well like finding the squares of numbers in your mind. Check it out !!

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Here is another wonderful math website that will help you instantly power-up your math muscle. Within minutes you will be calculating faster than the speeding calculator in your head. See it, to believe it ....

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