Видео с ютуба Quick Subtraction Tricks

Easy Subtraction Trick | Easy and fast way to learn | Math Tips and Tricks

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Fastest Subtraction Trick

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Learn Easy Subtraction Trick | Math Tips and Tricks | Solve in UNDER 1 SECOND!

Mental Addition and Subtraction Tips — Math Tricks with Arthur Benjamin

Mental Math Tricks - Addition and Subtraction in your head!

Mental Math Tricks - Addition, Subtraction, Multiplication & Division!