When you ask "What number is halfway between 90 and 797?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=90 and Y=797.
To find the number halfway between 90 and 797, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 90 and 797 into our formula, we get:
(90 + 797)/2 = 443.5
Thus, the number halfway between 90 and 797 is 443.5.
To check that our answer is correct, we subtract 90 from 443.5 and subtract 443.5 from 797 and compare the two numbers:
443.5 - 90 = 353.5
797 - 443.5 = 353.5
As you can see, the halfway number is 353.5 higher than 90 and 353.5 lower than 797. Therefore, our halfway between answer of 443.5 above is correct.
Halfway Between
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Halfway Between 90 and 798
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