When you ask "What number is halfway between 25 and 290?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=290.
To find the number halfway between 25 and 290, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 290 into our formula, we get:
(25 + 290)/2 = 157.5
Thus, the number halfway between 25 and 290 is 157.5.
To check that our answer is correct, we subtract 25 from 157.5 and subtract 157.5 from 290 and compare the two numbers:
157.5 - 25 = 132.5
290 - 157.5 = 132.5
As you can see, the halfway number is 132.5 higher than 25 and 132.5 lower than 290. Therefore, our halfway between answer of 157.5 above is correct.
Halfway Between
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Halfway Between 25 and 291
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