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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for That adds up 4 letters:

ADDS: Crunches some numbers
ADDS: Performs a basic operation
ADDS: Computes
ADDS: Gets to a bottom line
ADDS: Parenthetically mentions
ADDS: Builds on
ADDS: Goes on to say
ADDS: Writes further
ADDS: Contributes more
ADDS: Tosses in
ADDS: Annexes
ADDS: Interjects
ADDS: Does simple arithmetic
ADDS: Puts in
ADDS: Tacks on
ADDS: Throws in
ADDS: Works on a KenKen puzzle
ADDS: Does the math?
ADDS: Solves a kakuro
ADDS: Finds the bottom line
ADDS: Gets to a sum
ADDS: Puts on the pile
ADDS: Uses an abacus
ADDS: Puts two and two together
ADDS: Is now able to see the profile of
ADDS: Slips in, say
ADDS: Totals
ADDS: Does sums
ADDS: Practices Chisanbop
ADDS: Piles on
ADDS: Counts up
ADDS: Does elementary-school homework
ADDS: Inserts
ADDS: Sums up
ADDS: Tots up
ADDS: __ up (makes sense)
ADDS: Contributes (to)
ADDS: Kicks in
ADDS: Hits the + key
ADDS: Makes a contribution
ADDS: Friends on Facebook
ADDS: States further
ADDS: Sends a Facebook friend request
ADDS: Puts 2 and 2 together
ADDS: Says further
ADDS: Contributes
ADDS: Includes
ADDS: Becomes friends on Facebook
ADDS: Puts 2 and 3 together
ADDS: Sums