When you ask "What number is halfway between 39 and 318?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=39 and Y=318.
To find the number halfway between 39 and 318, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 39 and 318 into our formula, we get:
(39 + 318)/2 = 178.5
Thus, the number halfway between 39 and 318 is 178.5.
To check that our answer is correct, we subtract 39 from 178.5 and subtract 178.5 from 318 and compare the two numbers:
178.5 - 39 = 139.5
318 - 178.5 = 139.5
As you can see, the halfway number is 139.5 higher than 39 and 139.5 lower than 318. Therefore, our halfway between answer of 178.5 above is correct.
Halfway Between
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Halfway Between 39 and 319
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