When you ask "What number is halfway between 55 and 316?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=55 and Y=316.
To find the number halfway between 55 and 316, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 316 into our formula, we get:
(55 + 316)/2 = 185.5
Thus, the number halfway between 55 and 316 is 185.5.
To check that our answer is correct, we subtract 55 from 185.5 and subtract 185.5 from 316 and compare the two numbers:
185.5 - 55 = 130.5
316 - 185.5 = 130.5
As you can see, the halfway number is 130.5 higher than 55 and 130.5 lower than 316. Therefore, our halfway between answer of 185.5 above is correct.
Halfway Between
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Halfway Between 55 and 317
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