WHO?
Who is affected by operations? Everyone in this world is affected by operations. The Chinese invented/ created addition. No one created/ invented subtraction.
It is a part of evolution math.
Babylon's created the times table. There is no individual person or society who created multiplication. It goes back to India, Babylonia, Egypt, and China.
John Napier and Henry Briggs invented division. John Napier had his calculations checked by Henry Briggs.
Kate invented the + sign. One one knows when she invented the + sign.
Robert Recorde introduced the modern subtraction sign. The first sighting of the minus sign was introduced by Johannes Widmann. William Oughtred gave private lessons in math to anyone who wanted it.
Gottfried Wilhelm Leibniz thought it was too much.
Greeks, Romans, and Philosophers also created/ invented addition. Even adults are affected by these operations. Even though you might not think adults are affected by it they. Who has to help you with your math homework, adults.
John Napier is the one that is not wearing the cap. Henry Briggs is wearing a cap.