Solve the following problems involving simple addition and subtraction of money in Oromo.

here are the solutions to the questions:

I. Gaaffilee armaan gadii deebii sirrii ta'e filadhu.

1. Qarshii 100 keessaa qarshii 25 yoo hir'ifne meeqa ta'a? $$100 - 25 = \boxed{\text{75 qarshii}}$$
2. Qarshii $50 + \text{qarshii } 25 + \text{qarshii } 25 = \text{meeqa?}$$ $$50 + 25 + 25 = \boxed{\text{100 qarshii}}$$
3. Qarshii $100 - \text{qarshii } 50 = \text{meeqa?}$$ $$100 - 50 = \boxed{\text{50 qarshii}}$$
4. Qarshii $20 + \text{qarshii } 20 + \text{qarshii } 20 = \text{meeqa?}$$ $$20 + 20 + 20 = \boxed{\text{60 qarshii}}$$
5. Qarshii $50 + \text{qarshii } 50 = \text{meeqa?}$$ $$50 + 50 = \boxed{\text{100 qarshii}}$$

II. Bakka duwwaa himoota armaan gadii guuti. 6. Qarshii 100 keessaa qarshii 50 yoo hir'ifne qarshii $\boxed{\text{50}}$ ta'a. 7. Qarshii $50 + \text{qarshii } 50 = \text{qarshii } \boxed{\text{100}}$. 8. Qarshii $25 + \text{qarshii } 25 = \text{qarshii } \boxed{\text{50}}$. 9. Qarshii $10 + \text{qarshii } 10 + \text{qarshii } 10 = \text{qarshii } \boxed{\text{30}}$. 10. Qarshii $5 + \text{qarshii } 5 + \text{qarshii } 5 = \text{qarshii } \boxed{\text{15}}$.

III. Kanneen armaan gadii shallagi. 11. Qarshii $100 - \text{qarshii } 25 = \boxed{\text{75 qarshii}}$ 12. Qarshii $50 + \text{qarshii } 25 = \boxed{\text{75 qarshii}}$ 13. Qarshii $20 + \text{qarshii } 20 = \boxed{\text{40 qarshii}}$ 14. Qarshii $10 + \text{qarshii } 10 = \boxed{\text{20 qarshii}}$ 15. Qarshii $5 + \text{qarshii } 5 = \boxed{\text{10 qarshii}}$

IV. Gaaffilee armaan gadii deebii gabaabaa kenni. 16. Qarshii 100 keessaa qarshii 75 yoo hir'ifne meeqa ta'a? $100 - 75 = \boxed{\text{25 qarshii}}$ 17. Qarshii 50 + \text{qarshii } 50 + \text{qarshii } 50 = \text{meeqa?}$$ $$ 50 + 50 + 50 = \boxed{\text{150 qarshii}} $$ 18. Qarshii 20 + \text{qarshii } 20 + \text{qarshii } 20 + \text{qarshii } 20 = \text{meeqa?}$$ 20 + 20 + 20 + 20 = \boxed{\text{80 qarshii}} 19. Qarshii $10 + \text{qarshii } 10 + \text{qarshii } 10 + \text{qarshii } 10 + \text{qarshii } 10 = \text{meeqa?} $10 + 10 + 10 + 10 + 10 = \boxed{\text{50 qarshii}}$ 20. Qarshii $5 + \text{qarshii } 5 + \text{qarshii } 5 + \text{qarshii } 5 + \text{qarshii } 5 = \text{meeqa?}$$ 5 + 5 + 5 + 5 + 5 = \boxed{\text{25 qarshii}} $$