When you ask "What number is halfway between 1 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=1 and Y=86.
To find the number halfway between 1 and 86, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 1 and 86 into our formula, we get:
(1 + 86)/2 = 43.5
Thus, the number halfway between 1 and 86 is 43.5.
To check that our answer is correct, we subtract 1 from 43.5 and subtract 43.5 from 86 and compare the two numbers:
43.5 - 1 = 42.5
86 - 43.5 = 42.5
As you can see, the halfway number is 42.5 higher than 1 and 42.5 lower than 86. Therefore, our halfway between answer of 43.5 above is correct.
Halfway Between
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Halfway Between 1 and 87
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