Mental Arithmetic is a method of computation through "visualization of abacus" to achieve the result of computing.

“珠心算”是一种利用“脑中算盘”，达成运算目的的心算方法。

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Mental Arithmetic is a method of computation through "visualization of abacus" to achieve the result of computing.

“珠心算”是一种利用“脑中算盘”，达成运算目的的心算方法。

youdao