When you ask "What number is halfway between 74 and 81?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=74 and Y=81.
To find the number halfway between 74 and 81, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 74 and 81 into our formula, we get:
(74 + 81)/2 = 77.5
Thus, the number halfway between 74 and 81 is 77.5.
To check that our answer is correct, we subtract 74 from 77.5 and subtract 77.5 from 81 and compare the two numbers:
77.5 - 74 = 3.5
81 - 77.5 = 3.5
As you can see, the halfway number is 3.5 higher than 74 and 3.5 lower than 81. Therefore, our halfway between answer of 77.5 above is correct.
Halfway Between
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Halfway Between 74 and 82
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