When you ask "What number is halfway between 78 and 565?" 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=565.
To find the number halfway between 78 and 565, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 78 and 565 into our formula, we get:
(78 + 565)/2 = 321.5
Thus, the number halfway between 78 and 565 is 321.5.
To check that our answer is correct, we subtract 78 from 321.5 and subtract 321.5 from 565 and compare the two numbers:
321.5 - 78 = 243.5
565 - 321.5 = 243.5
As you can see, the halfway number is 243.5 higher than 78 and 243.5 lower than 565. Therefore, our halfway between answer of 321.5 above is correct.
Halfway Between
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Halfway Between 78 and 566
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