When you ask "What number is halfway between 78 and 268?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=78 and Y=268.
To find the number halfway between 78 and 268, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 78 and 268 into our formula, we get:
(78 + 268)/2 = 173
Thus, the number halfway between 78 and 268 is 173.
To check that our answer is correct, we subtract 78 from 173 and subtract 173 from 268 and compare the two numbers:
173 - 78 = 95
268 - 173 = 95
As you can see, the halfway number is 95 higher than 78 and 95 lower than 268. Therefore, our halfway between answer of 173 above is correct.
Halfway Between
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Halfway Between 78 and 269
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