Related Clues:

• Pile on
• Use a 24-Down
• Tally one's scorecard
• Double-check the bottom line
• Work on one's figures?
• Supplement with
• Thing one can do on one's fingers
• Word heard in math class
• Attach, as a codicil
• Tack (on)
• Do the numbers
• Increase (with "to")
• Contribute more
• Put together (numbers)
• Tot needs father, first to last