When you ask "What number is halfway between 55 and 354?" 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=354.
To find the number halfway between 55 and 354, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 354 into our formula, we get:
(55 + 354)/2 = 204.5
Thus, the number halfway between 55 and 354 is 204.5.
To check that our answer is correct, we subtract 55 from 204.5 and subtract 204.5 from 354 and compare the two numbers:
204.5 - 55 = 149.5
354 - 204.5 = 149.5
As you can see, the halfway number is 149.5 higher than 55 and 149.5 lower than 354. Therefore, our halfway between answer of 204.5 above is correct.
Halfway Between
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Halfway Between 55 and 355
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