When you ask "What number is halfway between 3 and 86?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=3 and Y=86.
To find the number halfway between 3 and 86, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 86 into our formula, we get:
(3 + 86)/2 = 44.5
Thus, the number halfway between 3 and 86 is 44.5.
To check that our answer is correct, we subtract 3 from 44.5 and subtract 44.5 from 86 and compare the two numbers:
44.5 - 3 = 41.5
86 - 44.5 = 41.5
As you can see, the halfway number is 41.5 higher than 3 and 41.5 lower than 86. Therefore, our halfway between answer of 44.5 above is correct.
Halfway Between
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Halfway Between 3 and 87
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