When you ask "What number is halfway between 21 and 227?" 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=227.
To find the number halfway between 21 and 227, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 227 into our formula, we get:
(21 + 227)/2 = 124
Thus, the number halfway between 21 and 227 is 124.
To check that our answer is correct, we subtract 21 from 124 and subtract 124 from 227 and compare the two numbers:
124 - 21 = 103
227 - 124 = 103
As you can see, the halfway number is 103 higher than 21 and 103 lower than 227. Therefore, our halfway between answer of 124 above is correct.
Halfway Between
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Halfway Between 21 and 228
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