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In simple
words, Mental arithmetic is a form of calculation
that DOES NOT involve the use of any physical
external instruments such as electronic calculator
or any other primitive instrument. It is done
solely in the mind, i.e. mentally. The concept,
which originated in China and got popular in
Malaysia and other far east nations, has come
to India. It is expected that the abacus learning
would become a part of basic education soon.
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