提示：点击例句中的单词，就可以看到词义解释

Simple arithmetics dictates that returns must fall .

简单的算术就知道回报必定下降。

What 's with that arithmetics ?

算来算去有什么意思？

Those tibetan students who were sent to tang to study arithmetics did not learn the computations to make calendars .

那些西藏学生被派往唐朝学习算法，不学习历法的计算。