独一不合错误的是：
one divides by one is one
应该是：
one divides into one is one。
divides是主动的第三人称动词，所以用into的介词。
1.1+1=2:
都准确
1-1=0:
one for one is zero
没有如许说的
subtract one from one, and you have zero
此外都准确
1/1=1:
one divided by one is one
此外都准确
1*1=1:
都准确
2. 那三种形式表达都准确
0