Answer:

ADDS

Answer	Crossword Clue
ADDS	Practices Chisanbop
ADDS	Tacks on
ADDS	Throws in

ADDS	Counts up
ADDS	Does elementary-school homework
ADDS	Inserts
ADDS	Sums up
ADDS	Tots up
ADDS	.. up (makes sense)
ADDS	Hits the + key
ADDS	Puts 2 and 2 together

ADDS	Kicks in
ADDS	Puts 2 and 3 together
ADDS	States further
ADDS	Writes further
ADDS	Includes
ADDS	Computes
ADDS	Finds the bottom line
ADDS	Contributes more

ADDS	Gets to a sum
ADDS	Says further
ADDS	Contributes
ADDS	Puts on the pile
ADDS	Tosses in
ADDS	Gets to a bottom line
ADDS	Crunches some numbers
ADDS	Annexes

ADDS	Parenthetically mentions
ADDS	Interjects
ADDS	Does sums
ADDS	Does simple arithmetic
ADDS	Puts in
ADDS	Attaches
ADDS	Does basic math
ADDS	Does some sums

ADDS	Does the math
ADDS	Makes sense, with "up"
ADDS	Puts two and two together
ADDS	Sums
ADDS	Mixes in