When you ask "What number is halfway between 23 and 428?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=23 and Y=428.
To find the number halfway between 23 and 428, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 428 into our formula, we get:
(23 + 428)/2 = 225.5
Thus, the number halfway between 23 and 428 is 225.5.
To check that our answer is correct, we subtract 23 from 225.5 and subtract 225.5 from 428 and compare the two numbers:
225.5 - 23 = 202.5
428 - 225.5 = 202.5
As you can see, the halfway number is 202.5 higher than 23 and 202.5 lower than 428. Therefore, our halfway between answer of 225.5 above is correct.
Halfway Between
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Halfway Between 23 and 429
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