The reason I can still do mental arithmetic despite not touching an abacus for over 40 years: Seeing numbers as 'groups of 5'

Since I was in junior high school, I haven't touched an abacus or practiced mental arithmetic for over 40 years.Even so, I ...

#35 Is it precisely because I'm bad at classroom lectures that I can perform super-fast mental arithmetic by using an imaginary abacus that isn't even there?

It was probably about two weeks ago. I watched a YouTube Short video. It was a mental arithmetic video from the Raiju Channel ...
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Education experts on how abacus could change the way children learn maths

For years, mathematics has been taught to many children as a subject of abstract numbers, formulas and procedures, something to be memorised and reproduced on paper. But the abacus is offering a ...
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7 Japanese memory techniques people use to remember more, from train operators to mental-abacus experts

For many years, studies on memory have indicated greater retention when information is associated with visuals, location, motion, and retrieval processes rather than repetition, and these principles ...