If you subtract one number from another, you do a calculation in which you take it away from the other number. For example, if you subtract 3 from 5, you get 2. (从一数中) 减去 (另一数)
verb [vt. 及物动词]vt. 减去,删减;减去,扣除
Mandy subtracted the date of birth from the date of death. 曼迪从死亡的日期减去了出生的日期。