When you ask "What number is halfway between 29 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=29 and Y=172.
To find the number halfway between 29 and 172, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 29 and 172 into our formula, we get:
(29 + 172)/2 = 100.5
Thus, the number halfway between 29 and 172 is 100.5.
To check that our answer is correct, we subtract 29 from 100.5 and subtract 100.5 from 172 and compare the two numbers:
100.5 - 29 = 71.5
172 - 100.5 = 71.5
As you can see, the halfway number is 71.5 higher than 29 and 71.5 lower than 172. Therefore, our halfway between answer of 100.5 above is correct.
Halfway Between
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Halfway Between 29 and 173
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