Question

Please can u help me with number two please I'm so lost and I don't know on what to do

Answer 1

Do 4x5 then add 00 at the end, 4x5 = 20 then add the two 0s so it would be 2000, so it is 2000

Answer 2

4 X 5 = 20, then add the two zeros from the 40 and the 50 to the end of that answer and you get 2,000.