VTMO 2026 - Grade 2 - Semifinal - SET 7 - Self-study Question 24

Different letters represent different digits. $\overline{TI}$, $\overline{TA}$ and $\overline{NN}$ are two-digit numbers. What is the greatest possible value of $\overline{TI}-\overline{TA}+\overline{NN}$?