In this worksheet you have to add or subtract 1000, 100, 10 or 1 to or from a number.
Example
Question: What number is 100 less than 7502?
Answer: Reduce the hundreds digit by 1 to become 7402
Question: What number is 1000 more than 539?
Answer: Increase the thousands digit by 1 to become 1539
Question: What number is 10 less than 4039?
Answer: Decrease the tens digit by 1 to become 4029