Crossword clue: 19.56789 ___ 2.34567 = 17.22222

The equation 19.56789 ___ 2.34567 = 17.22222 shows that you need to subtract one number from the other. When you take 2.34567 away from 19.56789, you get 17.22222. This means the missing word in the clue is "minus," which represents subtraction. So, the answer fits perfectly!