When you ask "What number is halfway between 87 and 164?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=87 and Y=164.
To find the number halfway between 87 and 164, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 164 into our formula, we get:
(87 + 164)/2 = 125.5
Thus, the number halfway between 87 and 164 is 125.5.
To check that our answer is correct, we subtract 87 from 125.5 and subtract 125.5 from 164 and compare the two numbers:
125.5 - 87 = 38.5
164 - 125.5 = 38.5
As you can see, the halfway number is 38.5 higher than 87 and 38.5 lower than 164. Therefore, our halfway between answer of 125.5 above is correct.
Halfway Between
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Halfway Between 87 and 165
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