When you ask "What number is halfway between 68 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=68 and Y=172.
To find the number halfway between 68 and 172, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 172 into our formula, we get:
(68 + 172)/2 = 120
Thus, the number halfway between 68 and 172 is 120.
To check that our answer is correct, we subtract 68 from 120 and subtract 120 from 172 and compare the two numbers:
120 - 68 = 52
172 - 120 = 52
As you can see, the halfway number is 52 higher than 68 and 52 lower than 172. Therefore, our halfway between answer of 120 above is correct.
Halfway Between
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Halfway Between 68 and 173
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