Evidence of early stages of arithmetic and numeration can be readily found.
我们很容易找到早期算法和计算的证据。
2
Even the earliest of tribes had a system of numeration that, if not advanced, was sufficient for the tasks that they had to perform.
即使是最早的部落也有一种计算系统，哪怕不先进，也足以完成他们必须执行的任务。
3
It will never be known how and when this numeration ability developed, but it is certain that numeration was well developed by the time humans had formed even semi-permanent settlements.