arithmetic

算术

Children learn basic arithmetic before moving on to algebra.

孩子先学基本算术，之后才进入代数。

计算、运算

Check your arithmetic; the total doesn't add up.

检查一下你的计算，总数对不起来。

盘算、算计引申用法

The electoral arithmetic favors the opposition this year.

今年的选举盘算对在野党有利。

算术的

The report compares the arithmetic mean with the median.

报告比较了算术平均数与中位数。