When you ask "What number is halfway between 54 and 165?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=54 and Y=165.
To find the number halfway between 54 and 165, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 54 and 165 into our formula, we get:
(54 + 165)/2 = 109.5
Thus, the number halfway between 54 and 165 is 109.5.
To check that our answer is correct, we subtract 54 from 109.5 and subtract 109.5 from 165 and compare the two numbers:
109.5 - 54 = 55.5
165 - 109.5 = 55.5
As you can see, the halfway number is 55.5 higher than 54 and 55.5 lower than 165. Therefore, our halfway between answer of 109.5 above is correct.
Halfway Between
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Halfway Between 54 and 166
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