The antonyms for the phrase "add together" are subtract, deduct, and eliminate. Subtract means to remove a certain quantity from the total or to take away. Deduct means to make a subtraction from a total amount or sum. Eliminate means to remove, get rid of, or exclude something from a set. These antonyms imply opposite operations to addition. While adding together increases the amount, subtracting, deducting, or eliminating reduces it. When doing mathematical operations in everyday life, it is important to understand the meaning of these words and their antonyms to perform accurate calculations.