When you ask "What number is halfway between 97 and 638?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=97 and Y=638.
To find the number halfway between 97 and 638, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 97 and 638 into our formula, we get:
(97 + 638)/2 = 367.5
Thus, the number halfway between 97 and 638 is 367.5.
To check that our answer is correct, we subtract 97 from 367.5 and subtract 367.5 from 638 and compare the two numbers:
367.5 - 97 = 270.5
638 - 367.5 = 270.5
As you can see, the halfway number is 270.5 higher than 97 and 270.5 lower than 638. Therefore, our halfway between answer of 367.5 above is correct.
Halfway Between
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Halfway Between 97 and 639
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