Addition & Subtraction Puzzle

6 4 7 0 6 2 6 2 1
1 1 6 2 0 5 1 3 0
8 4 6 8 8 6 9 7 7
1 3 0 5 8 6 7 6 1
7 9 9 8 3 2 6 4 7
3 8 6 3 2 6 2 3 5
4 7 5 4 0 2 3 1 7
6 6 0 9 2 8 5 4 7
3 1 6 4 2 0 2 0 1

Solve the equations and then find the answer in the puzzle grid above.

Addition:

924 + 96

638 + 182

3491 + 72

5324 + 939

Subtraction:

93 - 64

873 - 238

4311 - 2599

8213 - 3453

9218 - 5319