When you ask "What number is halfway between 69 and 778?" 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=778.
To find the number halfway between 69 and 778, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 778 into our formula, we get:
(69 + 778)/2 = 423.5
Thus, the number halfway between 69 and 778 is 423.5.
To check that our answer is correct, we subtract 69 from 423.5 and subtract 423.5 from 778 and compare the two numbers:
423.5 - 69 = 354.5
778 - 423.5 = 354.5
As you can see, the halfway number is 354.5 higher than 69 and 354.5 lower than 778. Therefore, our halfway between answer of 423.5 above is correct.
Halfway Between
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Halfway Between 69 and 779
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