比如：After doing the math, I realized that buying a new car would cost less than having my old car fixed.The little boy is doing math. (小男孩正在算數學。)
His sister helped him work out the math problems in his homework.
因此可以說：They calculated the costs and decided against hiring more part-time workers.
He didn’t calculate the number of guests correctly.不過這個字也可以指心機的算計
例如：Hiring his brother-in-law for the position was a calculated move.She is always calculating how to get ahead. (她總是在算計著要如何贏過別人。)