When you ask "What number is halfway between 17 and 126?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=17 and Y=126.
To find the number halfway between 17 and 126, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 126 into our formula, we get:
(17 + 126)/2 = 71.5
Thus, the number halfway between 17 and 126 is 71.5.
To check that our answer is correct, we subtract 17 from 71.5 and subtract 71.5 from 126 and compare the two numbers:
71.5 - 17 = 54.5
126 - 71.5 = 54.5
As you can see, the halfway number is 54.5 higher than 17 and 54.5 lower than 126. Therefore, our halfway between answer of 71.5 above is correct.
Halfway Between
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Halfway Between 17 and 127
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