The subtractional element of numbers was not discovered but rather it evolved into many numeracy systems over the centuries as for instance the ancient Roman numeral system involved subtraction in their numerals as for example IX means 10-1 and XC means 100-10
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Basic arithmetic has been developed by nearly every culture, so there isn't one definite person who discovered it.
The first herdsman who added ten sheep to another ten sheep around 10,000 BC?
who invented subtraction?
read the value A,b store the result of subtraction of a,b in continer subtraction display subtraction
the subtraction sign