When you ask "What number is halfway between 90 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=90 and Y=273.
To find the number halfway between 90 and 273, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 90 and 273 into our formula, we get:
(90 + 273)/2 = 181.5
Thus, the number halfway between 90 and 273 is 181.5.
To check that our answer is correct, we subtract 90 from 181.5 and subtract 181.5 from 273 and compare the two numbers:
181.5 - 90 = 91.5
273 - 181.5 = 91.5
As you can see, the halfway number is 91.5 higher than 90 and 91.5 lower than 273. Therefore, our halfway between answer of 181.5 above is correct.
Halfway Between
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Halfway Between 90 and 274
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