Question

Why is a mental maths​

Answer 1

Mental calculation consists of arithmetical calculations using only the human brain, with no help from any supplies or devices such as a calculator. People use mental calculation when computing tools are not available, when it is faster than other means of calculation, or even in a competitive context. ........

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Answer 2

Answer:

Mental maths is used to increase the mental ability and it is mostly used in abacus

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