In this activity, we will be adding or subtracting 1,000, 100, 10 or 1 to or from a number.
Question: What number is 100 less than 7,502?
Answer: Reduce the hundreds digit by 1 to become 7,402
Question: What number is 1,000 more than 539?
Answer: Increase the thousands digit by 1 to become 1,539
Question: What number is 10 less than 4,039?
Answer: Decrease the tens digit by 1 to become 4,029
Hopefully, you noticed that generally, we only need to change the digit in the appropriate column, the other digits usually stay unchanged.
Shall we have a go at some questions now?