When you ask "What number is halfway between 21 and 233?" 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=233.
To find the number halfway between 21 and 233, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 233 into our formula, we get:
(21 + 233)/2 = 127
Thus, the number halfway between 21 and 233 is 127.
To check that our answer is correct, we subtract 21 from 127 and subtract 127 from 233 and compare the two numbers:
127 - 21 = 106
233 - 127 = 106
As you can see, the halfway number is 106 higher than 21 and 106 lower than 233. Therefore, our halfway between answer of 127 above is correct.
Halfway Between
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Halfway Between 21 and 234
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