When you ask "What number is halfway between 97 and 139?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=97 and Y=139.
To find the number halfway between 97 and 139, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 97 and 139 into our formula, we get:
(97 + 139)/2 = 118
Thus, the number halfway between 97 and 139 is 118.
To check that our answer is correct, we subtract 97 from 118 and subtract 118 from 139 and compare the two numbers:
118 - 97 = 21
139 - 118 = 21
As you can see, the halfway number is 21 higher than 97 and 21 lower than 139. Therefore, our halfway between answer of 118 above is correct.
Halfway Between
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Halfway Between 97 and 140
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