When you ask "What number is halfway between 61 and 816?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=61 and Y=816.
To find the number halfway between 61 and 816, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 61 and 816 into our formula, we get:
(61 + 816)/2 = 438.5
Thus, the number halfway between 61 and 816 is 438.5.
To check that our answer is correct, we subtract 61 from 438.5 and subtract 438.5 from 816 and compare the two numbers:
438.5 - 61 = 377.5
816 - 438.5 = 377.5
As you can see, the halfway number is 377.5 higher than 61 and 377.5 lower than 816. Therefore, our halfway between answer of 438.5 above is correct.
Halfway Between
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Halfway Between 61 and 817
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