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2.1 Babylonian numerals and "place value" (Lesson 4)
In around 2000 B.C., Babylonian civilisation flourished in Mesopotamia (from the Greek meaning "land between the rivers") is the area of the Tigris-Euphrates river system, along the Tigris and Euphrates rivers, largely corresponding to modern Iraq. They had developed an abstract form of writing based on cuneiform (i.e., wedge-shaped) symbols. Their symbols were written on wet clay tablets, which were baked in the hot sun.
Babylonian number system is way more advanced than the Egyptian number system because of its use of the so-called "positional system" i.e., the value of a particular numeral depends both on the digit itself and its position within the number. The number system we use nowadays is also an example of positional system.