When you ask "What number is halfway between 21 and 344?" 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=344.
To find the number halfway between 21 and 344, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 344 into our formula, we get:
(21 + 344)/2 = 182.5
Thus, the number halfway between 21 and 344 is 182.5.
To check that our answer is correct, we subtract 21 from 182.5 and subtract 182.5 from 344 and compare the two numbers:
182.5 - 21 = 161.5
344 - 182.5 = 161.5
As you can see, the halfway number is 161.5 higher than 21 and 161.5 lower than 344. Therefore, our halfway between answer of 182.5 above is correct.
Halfway Between
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Halfway Between 21 and 345
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