When you ask "What number is halfway between 21 and 464?" 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=464.
To find the number halfway between 21 and 464, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 464 into our formula, we get:
(21 + 464)/2 = 242.5
Thus, the number halfway between 21 and 464 is 242.5.
To check that our answer is correct, we subtract 21 from 242.5 and subtract 242.5 from 464 and compare the two numbers:
242.5 - 21 = 221.5
464 - 242.5 = 221.5
As you can see, the halfway number is 221.5 higher than 21 and 221.5 lower than 464. Therefore, our halfway between answer of 242.5 above is correct.
Halfway Between
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Halfway Between 21 and 465
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