Does some summing

ADDS

Think of what you do when combining numbers in basic arithmetic—it’s the opposite of subtracting.

"Does some summing" is a straightforward clue where the answer is a simple synonym for adding numbers. "ADDS" fits because it directly means to perform addition, like when you total up figures. There’s no hidden wordplay here—just a clear definition pointing to a basic math action. The clue keeps it simple by matching the verb "summing" with its most common four-letter equivalent.