When you ask "What number is halfway between 55 and 306?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=55 and Y=306.
To find the number halfway between 55 and 306, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 306 into our formula, we get:
(55 + 306)/2 = 180.5
Thus, the number halfway between 55 and 306 is 180.5.
To check that our answer is correct, we subtract 55 from 180.5 and subtract 180.5 from 306 and compare the two numbers:
180.5 - 55 = 125.5
306 - 180.5 = 125.5
As you can see, the halfway number is 125.5 higher than 55 and 125.5 lower than 306. Therefore, our halfway between answer of 180.5 above is correct.
Halfway Between
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Halfway Between 55 and 307
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