When you ask "What number is halfway between 10 and 285?" 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=285.
To find the number halfway between 10 and 285, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 285 into our formula, we get:
(10 + 285)/2 = 147.5
Thus, the number halfway between 10 and 285 is 147.5.
To check that our answer is correct, we subtract 10 from 147.5 and subtract 147.5 from 285 and compare the two numbers:
147.5 - 10 = 137.5
285 - 147.5 = 137.5
As you can see, the halfway number is 137.5 higher than 10 and 137.5 lower than 285. Therefore, our halfway between answer of 147.5 above is correct.
Halfway Between
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Halfway Between 10 and 286
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