Related Clues:

• ___ line (dipstick mark)
• Use Windows 10
• Use a 112-Down
• Verb in a recipe
• Sum, put together
• Throw in sample of bread dough
• Use the "=SUM" function, say
• Tack on song to iPod
• Do some arithmetic
• ''. . . above our poor power to __ or detract'': Gettysburg Address
• Opposite of subtract
• Put numbers together
• Do this to find a sum
• Do a math function
• Find a math sum