When you ask "What number is halfway between 90 and 845?" 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=845.
To find the number halfway between 90 and 845, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 90 and 845 into our formula, we get:
(90 + 845)/2 = 467.5
Thus, the number halfway between 90 and 845 is 467.5.
To check that our answer is correct, we subtract 90 from 467.5 and subtract 467.5 from 845 and compare the two numbers:
467.5 - 90 = 377.5
845 - 467.5 = 377.5
As you can see, the halfway number is 377.5 higher than 90 and 377.5 lower than 845. Therefore, our halfway between answer of 467.5 above is correct.
Halfway Between
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Halfway Between 90 and 846
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