When you ask "What number is halfway between 55 and 190?" 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=190.
To find the number halfway between 55 and 190, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 190 into our formula, we get:
(55 + 190)/2 = 122.5
Thus, the number halfway between 55 and 190 is 122.5.
To check that our answer is correct, we subtract 55 from 122.5 and subtract 122.5 from 190 and compare the two numbers:
122.5 - 55 = 67.5
190 - 122.5 = 67.5
As you can see, the halfway number is 67.5 higher than 55 and 67.5 lower than 190. Therefore, our halfway between answer of 122.5 above is correct.
Halfway Between
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Halfway Between 55 and 191
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