When you ask "What number is halfway between 21 and 966?" 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=966.
To find the number halfway between 21 and 966, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 966 into our formula, we get:
(21 + 966)/2 = 493.5
Thus, the number halfway between 21 and 966 is 493.5.
To check that our answer is correct, we subtract 21 from 493.5 and subtract 493.5 from 966 and compare the two numbers:
493.5 - 21 = 472.5
966 - 493.5 = 472.5
As you can see, the halfway number is 472.5 higher than 21 and 472.5 lower than 966. Therefore, our halfway between answer of 493.5 above is correct.
Halfway Between
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Halfway Between 21 and 967
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