When you ask "What number is halfway between 76 and 821?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=76 and Y=821.
To find the number halfway between 76 and 821, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 76 and 821 into our formula, we get:
(76 + 821)/2 = 448.5
Thus, the number halfway between 76 and 821 is 448.5.
To check that our answer is correct, we subtract 76 from 448.5 and subtract 448.5 from 821 and compare the two numbers:
448.5 - 76 = 372.5
821 - 448.5 = 372.5
As you can see, the halfway number is 372.5 higher than 76 and 372.5 lower than 821. Therefore, our halfway between answer of 448.5 above is correct.
Halfway Between
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Halfway Between 76 and 822
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