
When you ask "What number is halfway between 100 and 379?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=100 and Y=379.

To find the number halfway between 100 and 379, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 100 and 379 into our formula, we get:
(100 + 379)/2 = 239.5
Thus, the number halfway between 100 and 379 is 239.5.
To check that our answer is correct, we subtract 100 from 239.5 and subtract 239.5 from 379 and compare the two numbers:
239.5 - 100 = 139.5
379 - 239.5 = 139.5
As you can see, the halfway number is 139.5 higher than 100 and 139.5 lower than 379. Therefore, our halfway between answer of 239.5 above is correct.
Halfway Between
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Halfway Between 100 and 380
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