When you ask "What number is halfway between 75 and 405?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=75 and Y=405.
To find the number halfway between 75 and 405, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 75 and 405 into our formula, we get:
(75 + 405)/2 = 240
Thus, the number halfway between 75 and 405 is 240.
To check that our answer is correct, we subtract 75 from 240 and subtract 240 from 405 and compare the two numbers:
240 - 75 = 165
405 - 240 = 165
As you can see, the halfway number is 165 higher than 75 and 165 lower than 405. Therefore, our halfway between answer of 240 above is correct.
Halfway Between
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Halfway Between 75 and 406
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