When you ask "What number is halfway between 28 and 145?" 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=145.
To find the number halfway between 28 and 145, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 145 into our formula, we get:
(28 + 145)/2 = 86.5
Thus, the number halfway between 28 and 145 is 86.5.
To check that our answer is correct, we subtract 28 from 86.5 and subtract 86.5 from 145 and compare the two numbers:
86.5 - 28 = 58.5
145 - 86.5 = 58.5
As you can see, the halfway number is 58.5 higher than 28 and 58.5 lower than 145. Therefore, our halfway between answer of 86.5 above is correct.
Halfway Between
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Halfway Between 28 and 146
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