The sum of the numbers is $1005$.

Would you like a detailed explanation or have any questions?

Here are 5 related questions to explore:

1. How do you break down large sums step-by-step?
2. What are some techniques for quickly adding long lists of numbers?
3. How do decimals affect the sum in a series of whole numbers?
4. Can we find the average of these numbers?
5. How would this calculation change if we used subtraction instead of addition?

Tip: When adding long sequences, grouping numbers into smaller parts can help avoid mistakes and speed up calculations.