When you ask "What number is halfway between 55 and 223?" 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=223.
To find the number halfway between 55 and 223, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 223 into our formula, we get:
(55 + 223)/2 = 139
Thus, the number halfway between 55 and 223 is 139.
To check that our answer is correct, we subtract 55 from 139 and subtract 139 from 223 and compare the two numbers:
139 - 55 = 84
223 - 139 = 84
As you can see, the halfway number is 84 higher than 55 and 84 lower than 223. Therefore, our halfway between answer of 139 above is correct.
Halfway Between
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Halfway Between 55 and 224
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