When you ask "What number is halfway between 82 and 138?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=82 and Y=138.
To find the number halfway between 82 and 138, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 82 and 138 into our formula, we get:
(82 + 138)/2 = 110
Thus, the number halfway between 82 and 138 is 110.
To check that our answer is correct, we subtract 82 from 110 and subtract 110 from 138 and compare the two numbers:
110 - 82 = 28
138 - 110 = 28
As you can see, the halfway number is 28 higher than 82 and 28 lower than 138. Therefore, our halfway between answer of 110 above is correct.
Halfway Between
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Halfway Between 82 and 139
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