When you ask "What number is halfway between 55 and 440?" 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=440.
To find the number halfway between 55 and 440, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 440 into our formula, we get:
(55 + 440)/2 = 247.5
Thus, the number halfway between 55 and 440 is 247.5.
To check that our answer is correct, we subtract 55 from 247.5 and subtract 247.5 from 440 and compare the two numbers:
247.5 - 55 = 192.5
440 - 247.5 = 192.5
As you can see, the halfway number is 192.5 higher than 55 and 192.5 lower than 440. Therefore, our halfway between answer of 247.5 above is correct.
Halfway Between
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Halfway Between 55 and 441
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