When you ask "What number is halfway between 84 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=84 and Y=145.
To find the number halfway between 84 and 145, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 145 into our formula, we get:
(84 + 145)/2 = 114.5
Thus, the number halfway between 84 and 145 is 114.5.
To check that our answer is correct, we subtract 84 from 114.5 and subtract 114.5 from 145 and compare the two numbers:
114.5 - 84 = 30.5
145 - 114.5 = 30.5
As you can see, the halfway number is 30.5 higher than 84 and 30.5 lower than 145. Therefore, our halfway between answer of 114.5 above is correct.
Halfway Between
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Halfway Between 84 and 146
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