avrilandeli4eve avrilandeli4eve 21-02-2020 Mathematics contestada Please help me on the following if possible :) 1. 5+(-7) 2. 9+(-5) 3. (-1)+9 4. 9+(-7) 5. 50+ (-7) 6. 27+ (-6) 7. 1+(-30) 8. 15+(-25)