When you ask "What number is halfway between 69 and 391?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=69 and Y=391.
To find the number halfway between 69 and 391, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 391 into our formula, we get:
(69 + 391)/2 = 230
Thus, the number halfway between 69 and 391 is 230.
To check that our answer is correct, we subtract 69 from 230 and subtract 230 from 391 and compare the two numbers:
230 - 69 = 161
391 - 230 = 161
As you can see, the halfway number is 161 higher than 69 and 161 lower than 391. Therefore, our halfway between answer of 230 above is correct.
Halfway Between
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Halfway Between 69 and 392
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