When you ask "What number is halfway between 97 and 921?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=97 and Y=921.
To find the number halfway between 97 and 921, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 97 and 921 into our formula, we get:
(97 + 921)/2 = 509
Thus, the number halfway between 97 and 921 is 509.
To check that our answer is correct, we subtract 97 from 509 and subtract 509 from 921 and compare the two numbers:
509 - 97 = 412
921 - 509 = 412
As you can see, the halfway number is 412 higher than 97 and 412 lower than 921. Therefore, our halfway between answer of 509 above is correct.
Halfway Between
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Halfway Between 97 and 922
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