계산 트릭 몇가지 꼭꼭 !!! ... 수학 과학 공부 하기전에 꼭 짚고가야합니다. (그것도 꼭 영어로...)
Trick 0 - Just Remember
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Multiplication by 5
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Multiplication by 11
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Same-Ten-Tech 74x76
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Math Factor Puzzle
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Multiplication by 25
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Multiplication by 125
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Division by 11
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Chemistry Physics - Let's Make a Battery
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Physics-Equilibrium of Force |
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Part1
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Part2
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Part3
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Part4
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