When you ask "What number is halfway between 68 and 171?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=68 and Y=171.
To find the number halfway between 68 and 171, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 171 into our formula, we get:
(68 + 171)/2 = 119.5
Thus, the number halfway between 68 and 171 is 119.5.
To check that our answer is correct, we subtract 68 from 119.5 and subtract 119.5 from 171 and compare the two numbers:
119.5 - 68 = 51.5
171 - 119.5 = 51.5
As you can see, the halfway number is 51.5 higher than 68 and 51.5 lower than 171. Therefore, our halfway between answer of 119.5 above is correct.
Halfway Between
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Halfway Between 68 and 172
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