时间:2018-12-13 作者:英语课 分类:与美国小学生一起学英文第3册


英语课

   Addition 加法


  Addition is the process of putting numbers together. 加法是把数字放在一起的运算过程。
  Addition is one of the simplest things in math. 加法是数学中最简单的运算之一。
  It is very basic in math as well. 它在数学中也是非常基础的。
  Everybody knows the + sign. 每个人都知道加法符号。
  The + sign is one of the math symbols. 加法符号是一个数学符号。
  + means more in Latin. 加号在拉丁文中是更多的意思。
  When was the + sign first introduced? 加号第一次被引入是什么时候?
  In 1557, one German mathematician 1 introduced the + sign for the first time. 1557年,一位德国数学家第一次引入了加号。

1 mathematician
n.数学家
  • The man with his back to the camera is a mathematician.背对着照相机的人是位数学家。
  • The mathematician analyzed his figures again.这位数学家再次分析研究了他的这些数字。
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