Question

what is mean mental maths​

Answer 1

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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. 

Answer 2

Answer:

mental calculation consist of arithmetical calculation using only the human brain with no help from any supplies or device such as a calculator people use mental calculation when computing tools are not available when it is faster than any mean of calculations or even in a competitive context.

Step-by-step explanation:

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