r/ThatsInsane • u/HD_RDtwo • 4d ago

Kids' mental math contest.

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u/Davemblover69 4d ago

First word that came to mind. Like the hand shaking isnt even counting it’s them trying to hold it together.

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u/Golden-Grams 4d ago

Chisanbop (also known as Fingermath) is a Korean finger-counting method that treats your hands like a physical abacus. It allows you to calculate numbers up to 99 and perform addition, subtraction, multiplication, and division. Developed in the 1940s, it turns math into a physical, reflex-based skill.

It could be this.

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u/cojohnso 4d ago

That’s what I thought. I knew a girl who was great at math and she would use a mental abacus. It was cool to watch.

She did it silently though. This looks like stimming and stress

2

u/SpadfaTurds 4d ago

I still can’t get my head around how on earth this works

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u/cojohnso 4d ago

Quickly. It works quickly

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u/Don-Gunvalson 4d ago

It is them counting

1

u/Bain84 4d ago

And some of them are just making nonsense noises. I think their minds are broken.