1. The problem is to perform the subtraction for the first problem: $535 - 340$. 2. Write the subtraction vertically: $$ \begin{array}{r} 535 \\ -340 \\ \hline \end{array} $$ 3. Subtract the digits starting from the right: - Units: $5 - 0 = 5$ - Tens: $3 - 4$ cannot be done without borrowing, so borrow 1 from the hundreds digit. - Hundreds: $5$ becomes $4$ after borrowing. - Tens: Now $13 - 4 = 9$ - Hundreds: $4 - 3 = 1$ 4. So the result is: $$ \begin{array}{r} 535 \\ -340 \\ \hline 195 \end{array} $$ 5. Therefore, $535 - 340 = 195$. This completes the first subtraction problem.