When you ask "What number is halfway between 25 and 320?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=320.
To find the number halfway between 25 and 320, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 320 into our formula, we get:
(25 + 320)/2 = 172.5
Thus, the number halfway between 25 and 320 is 172.5.
To check that our answer is correct, we subtract 25 from 172.5 and subtract 172.5 from 320 and compare the two numbers:
172.5 - 25 = 147.5
320 - 172.5 = 147.5
As you can see, the halfway number is 147.5 higher than 25 and 147.5 lower than 320. Therefore, our halfway between answer of 172.5 above is correct.
Halfway Between
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Halfway Between 25 and 321
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