Whole Number Subtraction Level 9
Subtract thousands. Borrow from the tens.

1)
      
  8362
- 7337
2)
      
  1523
- 1418
3)
      
  2372
- 2226
4)
      
  9333
- 7124
5)
      
  2162
- 1146
6)
      
  9771
- 8152
7)
      
  8634
- 7216
8)
      
  8946
- 3129
9)
      
  8631
- 8214
10)
      
  5322
- 4217
11)
      
  1163
- 1135
12)
      
  2473
- 2434
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