When you ask "What number is halfway between 28 and 84?" 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=84.
To find the number halfway between 28 and 84, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 84 into our formula, we get:
(28 + 84)/2 = 56
Thus, the number halfway between 28 and 84 is 56.
To check that our answer is correct, we subtract 28 from 56 and subtract 56 from 84 and compare the two numbers:
56 - 28 = 28
84 - 56 = 28
As you can see, the halfway number is 28 higher than 28 and 28 lower than 84. Therefore, our halfway between answer of 56 above is correct.
Halfway Between
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Halfway Between 28 and 85
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