When you ask "What number is halfway between 25 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=25 and Y=231.
To find the number halfway between 25 and 231, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 231 into our formula, we get:
(25 + 231)/2 = 128
Thus, the number halfway between 25 and 231 is 128.
To check that our answer is correct, we subtract 25 from 128 and subtract 128 from 231 and compare the two numbers:
128 - 25 = 103
231 - 128 = 103
As you can see, the halfway number is 103 higher than 25 and 103 lower than 231. Therefore, our halfway between answer of 128 above is correct.
Halfway Between
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Halfway Between 25 and 232
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