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