Subtracting hundreds such as (800 - 200 = 600) is like subtracting quantities of other
items. In this case 2 hundreds are subtracted from 8 hundreds to leave 6
hundreds. This would be similar to 2 oranges being subtracted from 8 oranges to
leave 6 oranges.

Each digit of a number in our number system has a different place value (ones, tens,
hundreds, etc.). Always subtract within the same place value column when
subtracting numbers.