When you ask "What number is halfway between 100 and 127?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=100 and Y=127.
To find the number halfway between 100 and 127, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 100 and 127 into our formula, we get:
(100 + 127)/2 = 113.5
Thus, the number halfway between 100 and 127 is 113.5.
To check that our answer is correct, we subtract 100 from 113.5 and subtract 113.5 from 127 and compare the two numbers:
113.5 - 100 = 13.5
127 - 113.5 = 13.5
As you can see, the halfway number is 13.5 higher than 100 and 13.5 lower than 127. Therefore, our halfway between answer of 113.5 above is correct.
Halfway Between
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Halfway Between 100 and 128
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