When you ask "What number is halfway between 0 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=0 and Y=409.
To find the number halfway between 0 and 409, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 0 and 409 into our formula, we get:
(0 + 409)/2 = 204.5
Thus, the number halfway between 0 and 409 is 204.5.
To check that our answer is correct, we subtract 0 from 204.5 and subtract 204.5 from 409 and compare the two numbers:
204.5 - 0 = 204.5
409 - 204.5 = 204.5
As you can see, the halfway number is 204.5 higher than 0 and 204.5 lower than 409. Therefore, our halfway between answer of 204.5 above is correct.
Halfway Between
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Halfway Between 0 and 410
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