When you ask "What number is halfway between 64 and 487?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=64 and Y=487.
To find the number halfway between 64 and 487, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 64 and 487 into our formula, we get:
(64 + 487)/2 = 275.5
Thus, the number halfway between 64 and 487 is 275.5.
To check that our answer is correct, we subtract 64 from 275.5 and subtract 275.5 from 487 and compare the two numbers:
275.5 - 64 = 211.5
487 - 275.5 = 211.5
As you can see, the halfway number is 211.5 higher than 64 and 211.5 lower than 487. Therefore, our halfway between answer of 275.5 above is correct.
Halfway Between
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Halfway Between 64 and 488
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