When you ask "What number is halfway between 71 and 512?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=71 and Y=512.
To find the number halfway between 71 and 512, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 512 into our formula, we get:
(71 + 512)/2 = 291.5
Thus, the number halfway between 71 and 512 is 291.5.
To check that our answer is correct, we subtract 71 from 291.5 and subtract 291.5 from 512 and compare the two numbers:
291.5 - 71 = 220.5
512 - 291.5 = 220.5
As you can see, the halfway number is 220.5 higher than 71 and 220.5 lower than 512. Therefore, our halfway between answer of 291.5 above is correct.
Halfway Between
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Halfway Between 71 and 513
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