When you ask "What number is halfway between 84 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=84 and Y=127.
To find the number halfway between 84 and 127, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 127 into our formula, we get:
(84 + 127)/2 = 105.5
Thus, the number halfway between 84 and 127 is 105.5.
To check that our answer is correct, we subtract 84 from 105.5 and subtract 105.5 from 127 and compare the two numbers:
105.5 - 84 = 21.5
127 - 105.5 = 21.5
As you can see, the halfway number is 21.5 higher than 84 and 21.5 lower than 127. Therefore, our halfway between answer of 105.5 above is correct.
Halfway Between
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Halfway Between 84 and 128
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