When you ask "What number is halfway between 75 and 555?" 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=555.
To find the number halfway between 75 and 555, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 75 and 555 into our formula, we get:
(75 + 555)/2 = 315
Thus, the number halfway between 75 and 555 is 315.
To check that our answer is correct, we subtract 75 from 315 and subtract 315 from 555 and compare the two numbers:
315 - 75 = 240
555 - 315 = 240
As you can see, the halfway number is 240 higher than 75 and 240 lower than 555. Therefore, our halfway between answer of 315 above is correct.
Halfway Between
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Halfway Between 75 and 556
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