Cuneiform is the world's oldest known writing system. It's also one of the most successful, because its use spans two-thirds of recorded human history. In the following 11 minute Numberphile video, Alex Bellos explains how to write numbers the way the Sumerians, Akkadians, Babylonians, Elamites, Hittites, Assyrians, and Hurrians did!
Be sure to check out The Biggest Math Story of 2020, in which we featured Matt Parker's video describing the world's first known math mistake, which also involves techniques for recording numbers that pre-date cuneiform writing. Just scroll down to the section on "A Year Defined by Mistakes".