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solving a mathematical problem without the use of paper and pencil,calculator, or computer is called using _________ math
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solving a mathematical problem without the use of paper and pencil,calculator, or computer is called using _________ math

User David Waters
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it's called mental math
User JohnyL
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solving a mathematical problem without the use of paper and pencil, calculator, or computer is called using mental arithmetic math.
User Gbachik
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