When you ask "What number is halfway between 90 and 305?" 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=305.
To find the number halfway between 90 and 305, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 90 and 305 into our formula, we get:
(90 + 305)/2 = 197.5
Thus, the number halfway between 90 and 305 is 197.5.
To check that our answer is correct, we subtract 90 from 197.5 and subtract 197.5 from 305 and compare the two numbers:
197.5 - 90 = 107.5
305 - 197.5 = 107.5
As you can see, the halfway number is 107.5 higher than 90 and 107.5 lower than 305. Therefore, our halfway between answer of 197.5 above is correct.
Halfway Between
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Halfway Between 90 and 306
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