When you ask "What number is halfway between 72 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=72 and Y=318.
To find the number halfway between 72 and 318, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 318 into our formula, we get:
(72 + 318)/2 = 195
Thus, the number halfway between 72 and 318 is 195.
To check that our answer is correct, we subtract 72 from 195 and subtract 195 from 318 and compare the two numbers:
195 - 72 = 123
318 - 195 = 123
As you can see, the halfway number is 123 higher than 72 and 123 lower than 318. Therefore, our halfway between answer of 195 above is correct.
Halfway Between
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Halfway Between 72 and 319
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