When you ask "What number is halfway between 1 and 218?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=1 and Y=218.
To find the number halfway between 1 and 218, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 1 and 218 into our formula, we get:
(1 + 218)/2 = 109.5
Thus, the number halfway between 1 and 218 is 109.5.
To check that our answer is correct, we subtract 1 from 109.5 and subtract 109.5 from 218 and compare the two numbers:
109.5 - 1 = 108.5
218 - 109.5 = 108.5
As you can see, the halfway number is 108.5 higher than 1 and 108.5 lower than 218. Therefore, our halfway between answer of 109.5 above is correct.
Halfway Between
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Halfway Between 1 and 219
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