(200+300)/2 = 250
200 + 300 + 150 + 250 = 900
200
100, 150, 200, 250, 300, 350, 400, 450 . . .
-350 -300 -280 --250 -200
200 + 300 + 250 = 750
250 (200+300=500%2=250)
(200+300)/2 = 250
300
200 + 300 + 150 + 250 = 900
300
200 + 300 200 + 200 + 100
What comes in the middle of 200 and 300
250
200
It is then 300 rounded to the nearest hundred because 50 rounds up to 100
50, 100, 150, 200, 250, 300, 350, 400, 450, 500