When you ask "What number is halfway between 28 and 143?" 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=143.
To find the number halfway between 28 and 143, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 143 into our formula, we get:
(28 + 143)/2 = 85.5
Thus, the number halfway between 28 and 143 is 85.5.
To check that our answer is correct, we subtract 28 from 85.5 and subtract 85.5 from 143 and compare the two numbers:
85.5 - 28 = 57.5
143 - 85.5 = 57.5
As you can see, the halfway number is 57.5 higher than 28 and 57.5 lower than 143. Therefore, our halfway between answer of 85.5 above is correct.
Halfway Between
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Halfway Between 28 and 144
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