When you ask "What number is halfway between 25 and 409?" 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=409.
To find the number halfway between 25 and 409, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 409 into our formula, we get:
(25 + 409)/2 = 217
Thus, the number halfway between 25 and 409 is 217.
To check that our answer is correct, we subtract 25 from 217 and subtract 217 from 409 and compare the two numbers:
217 - 25 = 192
409 - 217 = 192
As you can see, the halfway number is 192 higher than 25 and 192 lower than 409. Therefore, our halfway between answer of 217 above is correct.
Halfway Between
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Halfway Between 25 and 410
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