What's in the middle between 275 and 310
(310 - 275)/2 + 275 = 35/2 + 275 = 17.5 + 275 = 292.5.
the answer is 292.5 because 310-275 is like 35 and 35 divided by 2 is 17.5 and then 17.5 + 275 = 292.5
