When you ask "What number is halfway between 72 and 257?" 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=257.
To find the number halfway between 72 and 257, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 257 into our formula, we get:
(72 + 257)/2 = 164.5
Thus, the number halfway between 72 and 257 is 164.5.
To check that our answer is correct, we subtract 72 from 164.5 and subtract 164.5 from 257 and compare the two numbers:
164.5 - 72 = 92.5
257 - 164.5 = 92.5
As you can see, the halfway number is 92.5 higher than 72 and 92.5 lower than 257. Therefore, our halfway between answer of 164.5 above is correct.
Halfway Between
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Halfway Between 72 and 258
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