When you ask "What number is halfway between 86 and 185?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=86 and Y=185.
To find the number halfway between 86 and 185, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 185 into our formula, we get:
(86 + 185)/2 = 135.5
Thus, the number halfway between 86 and 185 is 135.5.
To check that our answer is correct, we subtract 86 from 135.5 and subtract 135.5 from 185 and compare the two numbers:
135.5 - 86 = 49.5
185 - 135.5 = 49.5
As you can see, the halfway number is 49.5 higher than 86 and 49.5 lower than 185. Therefore, our halfway between answer of 135.5 above is correct.
Halfway Between
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Halfway Between 86 and 186
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