When you ask "What number is halfway between 55 and 438?" 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=438.
To find the number halfway between 55 and 438, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 438 into our formula, we get:
(55 + 438)/2 = 246.5
Thus, the number halfway between 55 and 438 is 246.5.
To check that our answer is correct, we subtract 55 from 246.5 and subtract 246.5 from 438 and compare the two numbers:
246.5 - 55 = 191.5
438 - 246.5 = 191.5
As you can see, the halfway number is 191.5 higher than 55 and 191.5 lower than 438. Therefore, our halfway between answer of 246.5 above is correct.
Halfway Between
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Halfway Between 55 and 439
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