summation

老师让我们做这些数字的加法运算。

The teacher asked us to do the ___summation of these numbers.

检察官在庭审结束前做了有力的总结陈词。

The prosecutor presented a compelling ___summation before the trial concluded.

计算这个月的总支出，需要把所有开销相加。

To get this month's total expenses, you need to do a ___summation of all the costs.