When you ask "What number is halfway between 51 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=51 and Y=316.
To find the number halfway between 51 and 316, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 316 into our formula, we get:
(51 + 316)/2 = 183.5
Thus, the number halfway between 51 and 316 is 183.5.
To check that our answer is correct, we subtract 51 from 183.5 and subtract 183.5 from 316 and compare the two numbers:
183.5 - 51 = 132.5
316 - 183.5 = 132.5
As you can see, the halfway number is 132.5 higher than 51 and 132.5 lower than 316. Therefore, our halfway between answer of 183.5 above is correct.
Halfway Between
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Halfway Between 51 and 317
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