When you ask "What number is halfway between 18 and 53?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=18 and Y=53.
To find the number halfway between 18 and 53, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 53 into our formula, we get:
(18 + 53)/2 = 35.5
Thus, the number halfway between 18 and 53 is 35.5.
To check that our answer is correct, we subtract 18 from 35.5 and subtract 35.5 from 53 and compare the two numbers:
35.5 - 18 = 17.5
53 - 35.5 = 17.5
As you can see, the halfway number is 17.5 higher than 18 and 17.5 lower than 53. Therefore, our halfway between answer of 35.5 above is correct.
Halfway Between
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Halfway Between 18 and 54
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