When you ask "What number is halfway between 21 and 226?" 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=226.
To find the number halfway between 21 and 226, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 226 into our formula, we get:
(21 + 226)/2 = 123.5
Thus, the number halfway between 21 and 226 is 123.5.
To check that our answer is correct, we subtract 21 from 123.5 and subtract 123.5 from 226 and compare the two numbers:
123.5 - 21 = 102.5
226 - 123.5 = 102.5
As you can see, the halfway number is 102.5 higher than 21 and 102.5 lower than 226. Therefore, our halfway between answer of 123.5 above is correct.
Halfway Between
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Halfway Between 21 and 227
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