We do addition and subtraction in arithmetic.
在算术里,我们作加减运算。
Instead symbols like + or * are used to define functions that can do things like normal numerical addition and subtraction.
相反,使用 +或 *等符号定义可以执行普通数字加减法的函数。
The little boy can already do simple problems in addition and subtraction.
这个小不点孩子都已经会做简单的加减法问题了。
The danger: students who can not even do simple addition and subtraction.
很危险的是,一些先生甚至连复杂的加减法都不会做。
The danger: students who can not even do simple addition and subtraction.
很危险的是,一些先生甚至连复杂的加减法都不会做。
应用推荐