When you ask "What number is halfway between 4 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=4 and Y=273.
To find the number halfway between 4 and 273, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 273 into our formula, we get:
(4 + 273)/2 = 138.5
Thus, the number halfway between 4 and 273 is 138.5.
To check that our answer is correct, we subtract 4 from 138.5 and subtract 138.5 from 273 and compare the two numbers:
138.5 - 4 = 134.5
273 - 138.5 = 134.5
As you can see, the halfway number is 134.5 higher than 4 and 134.5 lower than 273. Therefore, our halfway between answer of 138.5 above is correct.
Halfway Between
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Halfway Between 4 and 274
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