Halfway Between 21 and 487

When you ask "What number is halfway between 21 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=21 and Y=487.

Halfway Between Line

To find the number halfway between 21 and 487, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 21 and 487 into our formula, we get:

(21 + 487)/2 = 254

Thus, the number halfway between 21 and 487 is 254.

To check that our answer is correct, we subtract 21 from 254 and subtract 254 from 487 and compare the two numbers:

254 - 21 = 233
487 - 254 = 233

As you can see, the halfway number is 233 higher than 21 and 233 lower than 487. Therefore, our halfway between answer of 254 above is correct.

Halfway Between
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Halfway Between 21 and 488
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