When you ask "What number is halfway between 86 and 122?" 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=122.
To find the number halfway between 86 and 122, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 122 into our formula, we get:
(86 + 122)/2 = 104
Thus, the number halfway between 86 and 122 is 104.
To check that our answer is correct, we subtract 86 from 104 and subtract 104 from 122 and compare the two numbers:
104 - 86 = 18
122 - 104 = 18
As you can see, the halfway number is 18 higher than 86 and 18 lower than 122. Therefore, our halfway between answer of 104 above is correct.
Halfway Between
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Halfway Between 86 and 123
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