When you ask "What number is halfway between 19 and 28?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=19 and Y=28.
To find the number halfway between 19 and 28, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 19 and 28 into our formula, we get:
(19 + 28)/2 = 23.5
Thus, the number halfway between 19 and 28 is 23.5.
To check that our answer is correct, we subtract 19 from 23.5 and subtract 23.5 from 28 and compare the two numbers:
23.5 - 19 = 4.5
28 - 23.5 = 4.5
As you can see, the halfway number is 4.5 higher than 19 and 4.5 lower than 28. Therefore, our halfway between answer of 23.5 above is correct.
Halfway Between
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Halfway Between 19 and 29
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