When you ask "What number is halfway between 55 and 207?" 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=207.
To find the number halfway between 55 and 207, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 207 into our formula, we get:
(55 + 207)/2 = 131
Thus, the number halfway between 55 and 207 is 131.
To check that our answer is correct, we subtract 55 from 131 and subtract 131 from 207 and compare the two numbers:
131 - 55 = 76
207 - 131 = 76
As you can see, the halfway number is 76 higher than 55 and 76 lower than 207. Therefore, our halfway between answer of 131 above is correct.
Halfway Between
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Halfway Between 55 and 208
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