This document provides the solutions to 5 math problems presented as slides. The first problem is 17 + 13 - 15, which equals 15. The second is 25 - 15 + 9 - 8, which equals 11. The third is 3 × 2 + 7, which equals 13. The fourth is 3 × 5 : 2, which equals 7.5. The fifth is (2 + 3) × 4, which equals 20.