When you ask "What number is halfway between 55 and 186?" 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=186.
To find the number halfway between 55 and 186, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 186 into our formula, we get:
(55 + 186)/2 = 120.5
Thus, the number halfway between 55 and 186 is 120.5.
To check that our answer is correct, we subtract 55 from 120.5 and subtract 120.5 from 186 and compare the two numbers:
120.5 - 55 = 65.5
186 - 120.5 = 65.5
As you can see, the halfway number is 65.5 higher than 55 and 65.5 lower than 186. Therefore, our halfway between answer of 120.5 above is correct.
Halfway Between
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Halfway Between 55 and 187
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