1. The problem is to calculate five thousand Naira divided by ten minus forty. 2. First, convert the words to numbers: five thousand = 5000, ten = 10, forty = 40. 3. The expression is $\frac{5000}{10} - 40$. 4. Calculate the division: $\frac{5000}{10} = 500$. 5. Subtract forty: $500 - 40 = 460$. 6. Therefore, the final answer is $460$.