Borrow over three zeros

Find the difference of the numbers below. Use regrouping where necessary.

1) Solve

8000

-4755

2) Solve

5000

-2943

3) Solve

4000

-1440

4) Solve

7000

-1876

5) Solve

8000

-1193

6) Solve

8000

-4540

7) Solve

3000

-1471

8) Solve

1000

-669

9) Solve

6000

-4100

10) Solve

6000

-4482

11) Solve

8000

-6783

12) Solve

2000

-318

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