When you ask "What number is halfway between 90 and 133?" 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=133.
To find the number halfway between 90 and 133, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 90 and 133 into our formula, we get:
(90 + 133)/2 = 111.5
Thus, the number halfway between 90 and 133 is 111.5.
To check that our answer is correct, we subtract 90 from 111.5 and subtract 111.5 from 133 and compare the two numbers:
111.5 - 90 = 21.5
133 - 111.5 = 21.5
As you can see, the halfway number is 21.5 higher than 90 and 21.5 lower than 133. Therefore, our halfway between answer of 111.5 above is correct.
Halfway Between
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Halfway Between 90 and 134
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