When you ask "What number is halfway between 11 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=11 and Y=273.
To find the number halfway between 11 and 273, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 273 into our formula, we get:
(11 + 273)/2 = 142
Thus, the number halfway between 11 and 273 is 142.
To check that our answer is correct, we subtract 11 from 142 and subtract 142 from 273 and compare the two numbers:
142 - 11 = 131
273 - 142 = 131
As you can see, the halfway number is 131 higher than 11 and 131 lower than 273. Therefore, our halfway between answer of 142 above is correct.
Halfway Between
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Halfway Between 11 and 274
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