Soluzione - Long subtraction

Because the upper digit (2) in the ones column is too small to get a positive difference, borrow 1 from the digit (9) in the next number place which becomes (8) and get (12).

Subtract the numbers in the ones column from the top number:
12-7=5

Because the upper digit (8) in the tens column is too small to get a positive difference, borrow 1 from the digit (3) in the next number place which becomes (2) and get (18).

Subtract the numbers in the tens column from the top number:
18-9=9

Subtract the numbers in the hundreds column from the top number:
2-2=0

Subtract the numbers in the thousands column from the top number:
4-2=2

Subtract the numbers in the ten thousands column from the top number:
8-6=2

Write 6 in the hundred thousands place.

The solution is: 622,095