
When you ask "What number is halfway between 55 and 340?" 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=340.

To find the number halfway between 55 and 340, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 340 into our formula, we get:
(55 + 340)/2 = 197.5
Thus, the number halfway between 55 and 340 is 197.5.
To check that our answer is correct, we subtract 55 from 197.5 and subtract 197.5 from 340 and compare the two numbers:
197.5 - 55 = 142.5
340 - 197.5 = 142.5
As you can see, the halfway number is 142.5 higher than 55 and 142.5 lower than 340. Therefore, our halfway between answer of 197.5 above is correct.
Halfway Between
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Halfway Between 55 and 341
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