UC知道介绍算盘（英文）
来源：百度知道 编辑：UC知道 时间：2024/06/17 18:02:18
1.谁发明的？
2.什么时候发明的？
3.怎么发明的？
4.发明它用来做什么？
5.对我们的生活有什么影响？
请快一点，语言不用太繁琐，像一个中学生写的作文
2.什么时候发明的？
3.怎么发明的？
4.发明它用来做什么？
5.对我们的生活有什么影响？
请快一点，语言不用太繁琐，像一个中学生写的作文
An abacus, also called a counting frame, is a calculating tool used primarily by Asians for performing arithmetic processes. Nowadays, abaci are often constructed as a wooden frame with beads sliding on wires, but originally they were beads or stones moved in grooves in sand or on tablets of wood, stone, or metal. The abacus was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants and clerks in China, Japan, Africa, India and elsewhere.
The user of an abacus is called an abacist; he or she slides the beads of the abacus by hand.
Who invented it?
When was it invented?
How was it invented?
What did the invention be used for?
How does the invention effect our life?