subtraction

n. /səbˈtrækʃn/ B1

减法；扣除

The process of taking one number away from another.

仙境例句

In subtraction class, the fish took away one shell, then another, until none were left.

上减法课时，小鱼们拿走一个贝壳，再拿走一个，直到一个也不剩。