When you ask "What number is halfway between 84 and 273?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=84 and Y=273.
To find the number halfway between 84 and 273, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 273 into our formula, we get:
(84 + 273)/2 = 178.5
Thus, the number halfway between 84 and 273 is 178.5.
To check that our answer is correct, we subtract 84 from 178.5 and subtract 178.5 from 273 and compare the two numbers:
178.5 - 84 = 94.5
273 - 178.5 = 94.5
As you can see, the halfway number is 94.5 higher than 84 and 94.5 lower than 273. Therefore, our halfway between answer of 178.5 above is correct.
Halfway Between
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Halfway Between 84 and 274
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