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Winston Churchill
The first recorded stop sign was placed in Detroit, Michigan in 1915 by the American Association of State Highway Officials (AASHO).
Jose L. Hernandez-Rebollar was born in Puebla, Mexico. He invented the AcceleGlove. It is an electronic glove which translates sign language into text or speech.
The mechanical calculator was invented by Blaise Pascal in the 1640s. He created the Pascaline, a device designed to perform addition and subtraction, primarily to help his father with tax calculations. This invention marked a significant advancement in calculating technology, laying the groundwork for future developments in computing.
looda le lo mera
Obviously it was not invented. It was always just there.
who invented subtraction?
the subtraction sign
The minus, negative, or subtraction symbol is derived from a tilde written over "m" that used to be used to indicate subtraction. It might also be a shorthand version of the "m" itself.
The less than sign I believe that you are talking about is the minus/subtraction sign? The addition sign, +, is the opposite of the subtraction sign :)
A minus sign
A subtraction sign.
A subtraction sum will contain a minus sign.
It is called the minus sign. - .
minus
Robert Recorde, who designed the equals sign, introduced plus and minus in 1557. Brahmagupta was an Indian mathematician who invented the multiplication sign around the 19th century. Johann Rahn first used the division sign in his book Teutshe algebra in 1659.
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