Fill in the numbers you must subtract to get to the previous multiple of 100, and the numbers you must add to get to the next multiple of 100.

The previous multiple of 100 is 0. To subtract: $73 - 0 = 73$.
The next multiple of 100 is 100. To add: $100 - 73 = 27$.

The previous multiple of 100 is 500. To subtract: $573 - 500 = 73$.
The next multiple of 100 is 600. To add: $600 - 573 = 27$.

The previous multiple of 100 is 300. To subtract: $346 - 300 = 46$.
The next multiple of 100 is 400. To add: $400 - 346 = 54$.

The previous multiple of 100 is 600. To subtract: $682 - 600 = 82$.
The next multiple of 100 is 700. To add: $700 - 682 = 18$.

The completed grid for is:

:
Continue filling in the numbers using the same rule.

The previous multiple of 100 is 400. To subtract: $444 - 400 = 44$.
The next multiple of 100 is 500. To add: $500 - 444 = 56$.

The previous multiple of 100 is 100. To subtract: $168 - 100 = 68$.
The next multiple of 100 is 200. To add: $200 - 168 = 32$.

The previous multiple of 100 is 200. To subtract: $295 - 200 = 95$.
The next multiple of 100 is 300. To add: $300 - 295 = 5$.

The completed grid for is: