Take 1000 and add 40 to it Now add another 1000 Now add 30 Add another 1000 Now add 20 Now add?
5000,
Unless I am missing something, it is 4100. You are adding multiples of 10s, not multiples of 100s, so it would take a LOT to add to that 5th 1000. Although I don't see how either answer is a...