When you ask "What number is halfway between 8 and 172?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=8 and Y=172.
To find the number halfway between 8 and 172, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 172 into our formula, we get:
(8 + 172)/2 = 90
Thus, the number halfway between 8 and 172 is 90.
To check that our answer is correct, we subtract 8 from 90 and subtract 90 from 172 and compare the two numbers:
90 - 8 = 82
172 - 90 = 82
As you can see, the halfway number is 82 higher than 8 and 82 lower than 172. Therefore, our halfway between answer of 90 above is correct.
Halfway Between
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Halfway Between 8 and 173
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