When you ask "What number is halfway between 28 and 137?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=28 and Y=137.
To find the number halfway between 28 and 137, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 137 into our formula, we get:
(28 + 137)/2 = 82.5
Thus, the number halfway between 28 and 137 is 82.5.
To check that our answer is correct, we subtract 28 from 82.5 and subtract 82.5 from 137 and compare the two numbers:
82.5 - 28 = 54.5
137 - 82.5 = 54.5
As you can see, the halfway number is 54.5 higher than 28 and 54.5 lower than 137. Therefore, our halfway between answer of 82.5 above is correct.
Halfway Between
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Halfway Between 28 and 138
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