When you ask "What number is halfway between 42 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=42 and Y=409.
To find the number halfway between 42 and 409, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 409 into our formula, we get:
(42 + 409)/2 = 225.5
Thus, the number halfway between 42 and 409 is 225.5.
To check that our answer is correct, we subtract 42 from 225.5 and subtract 225.5 from 409 and compare the two numbers:
225.5 - 42 = 183.5
409 - 225.5 = 183.5
As you can see, the halfway number is 183.5 higher than 42 and 183.5 lower than 409. Therefore, our halfway between answer of 225.5 above is correct.
Halfway Between
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Halfway Between 42 and 410
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