When you ask "What number is halfway between 55 and 430?" 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=430.
To find the number halfway between 55 and 430, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 430 into our formula, we get:
(55 + 430)/2 = 242.5
Thus, the number halfway between 55 and 430 is 242.5.
To check that our answer is correct, we subtract 55 from 242.5 and subtract 242.5 from 430 and compare the two numbers:
242.5 - 55 = 187.5
430 - 242.5 = 187.5
As you can see, the halfway number is 187.5 higher than 55 and 187.5 lower than 430. Therefore, our halfway between answer of 242.5 above is correct.
Halfway Between
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Halfway Between 55 and 431
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