When you ask "What number is halfway between 10 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=10 and Y=205.
To find the number halfway between 10 and 205, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 205 into our formula, we get:
(10 + 205)/2 = 107.5
Thus, the number halfway between 10 and 205 is 107.5.
To check that our answer is correct, we subtract 10 from 107.5 and subtract 107.5 from 205 and compare the two numbers:
107.5 - 10 = 97.5
205 - 107.5 = 97.5
As you can see, the halfway number is 97.5 higher than 10 and 97.5 lower than 205. Therefore, our halfway between answer of 107.5 above is correct.
Halfway Between
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Halfway Between 10 and 206
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