The schoolwork came easily to me, although I entered somewhat behind my class-mates in understanding that other method of symbolic logic: arithmetic.

学校的作业对我来说不难，但我在另一种象征逻辑学——数学——方面的理解力就落后于同学。

youdao

People should feel free to correct my arithmetic because it's often wrong; 90 right? Two-thirds of 90, whoops, what do I need, start again.

我要是算错了要提醒我,我总算错,90对吧,90的2/3,我说错了

耶鲁公开课 - 博弈论课程节选

So even at my level of arithmetic that's a lot less than 30%.

就我的算数水平都知道这绝对少于30%

耶鲁公开课 - 博弈论课程节选

On the other hand, I had an early facility with language, but it was my complete hopelessness with arithmetic that was the single dominant experience of my young life.

NPR: Living With an Inability to Do Math

My favorite market index is Value Line because it is a straight arithmetic index of 1, 650 stocks.

FORBES: Like Jimmy Cannon, Nobody Asked Me, But...