When you ask "What number is halfway between 72 and 231?" 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=231.
To find the number halfway between 72 and 231, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 231 into our formula, we get:
(72 + 231)/2 = 151.5
Thus, the number halfway between 72 and 231 is 151.5.
To check that our answer is correct, we subtract 72 from 151.5 and subtract 151.5 from 231 and compare the two numbers:
151.5 - 72 = 79.5
231 - 151.5 = 79.5
As you can see, the halfway number is 79.5 higher than 72 and 79.5 lower than 231. Therefore, our halfway between answer of 151.5 above is correct.
Halfway Between
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Halfway Between 72 and 232
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