Soluzione - Long subtraction

Subtract the numbers in the ones column from the top number:
0-0=0

Subtract the numbers in the tens column from the top number:
0-0=0

Because the upper digit (0) in the hundreds column is too small to get a positive difference, borrow 1 from the number to the left (200) which becomes (199) and get (10).

Subtract the numbers in the hundreds column from the top number:
10-8=2

Subtract the numbers in the thousands column from the top number:
9-2=7

Subtract the numbers in the ten thousands column from the top number:
9-6=3

Write 1 in the hundred thousands place.

The solution is: 137,200