When you ask "What number is halfway between 10 and 503?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=10 and Y=503.
To find the number halfway between 10 and 503, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 503 into our formula, we get:
(10 + 503)/2 = 256.5
Thus, the number halfway between 10 and 503 is 256.5.
To check that our answer is correct, we subtract 10 from 256.5 and subtract 256.5 from 503 and compare the two numbers:
256.5 - 10 = 246.5
503 - 256.5 = 246.5
As you can see, the halfway number is 246.5 higher than 10 and 246.5 lower than 503. Therefore, our halfway between answer of 256.5 above is correct.
Halfway Between
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Halfway Between 10 and 504
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