When you ask "What number is halfway between 4 and 205?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=4 and Y=205.
To find the number halfway between 4 and 205, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 205 into our formula, we get:
(4 + 205)/2 = 104.5
Thus, the number halfway between 4 and 205 is 104.5.
To check that our answer is correct, we subtract 4 from 104.5 and subtract 104.5 from 205 and compare the two numbers:
104.5 - 4 = 100.5
205 - 104.5 = 100.5
As you can see, the halfway number is 100.5 higher than 4 and 100.5 lower than 205. Therefore, our halfway between answer of 104.5 above is correct.
Halfway Between
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Halfway Between 4 and 206
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