In the context of a word problem, which quantity directly represents the amount added or removed?

• A. Start quantity
• B. Change quantity
• C. Result quantity
• D. Final quantity

Answer: (B)

The amount that is directly added or removed is the change quantity. This value captures the magnitude and direction of the modification itself, independent of where you started or where you end up. Start quantity tells you the initial amount before any changes. The final or result quantity shows the amount after the change has been made. The change quantity, positive for additions and negative for removals, precisely represents how much was added or taken away. For example, starting with 20 and adding 7 gives a change quantity of +7 and a final amount of 27; removing 5 gives a change quantity of -5 and a final amount of 15.