The integer 2022 is positive and has four digits. Three of its digits are 2 and one of its digits is 0 . What is the difference between the largest and smallest four-digit integers that can be made using three 2 's and one 0 as digits?
Since the first digit of a four-digit integer cannot be 0 , there are three integers with the given property: 2022, 2202, and 2220 .

The largest is 2220 and the smallest is 2022 , so the answer is $2220-2022=198$.

ANSWER: 198