deduction from income

例句：

1. 1.The company's profit was a deduction from its total revenue.
   公司的盈利是从总收入中扣除的。
2. 2. The math problem required a deduction for the square root of 4.
   这个数学问题需要对4的平方根进行减法运算。
3. 3. The teacher made a deduction from the class budget to cover the unexpected expenses.
   老师从班级预算中扣除了意外支出。