When you ask "What number is halfway between 69 and 842?" 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=842.
To find the number halfway between 69 and 842, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 842 into our formula, we get:
(69 + 842)/2 = 455.5
Thus, the number halfway between 69 and 842 is 455.5.
To check that our answer is correct, we subtract 69 from 455.5 and subtract 455.5 from 842 and compare the two numbers:
455.5 - 69 = 386.5
842 - 455.5 = 386.5
As you can see, the halfway number is 386.5 higher than 69 and 386.5 lower than 842. Therefore, our halfway between answer of 455.5 above is correct.
Halfway Between
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Halfway Between 69 and 843
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