When you ask "What number is halfway between 45 and 122?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=45 and Y=122.
To find the number halfway between 45 and 122, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 45 and 122 into our formula, we get:
(45 + 122)/2 = 83.5
Thus, the number halfway between 45 and 122 is 83.5.
To check that our answer is correct, we subtract 45 from 83.5 and subtract 83.5 from 122 and compare the two numbers:
83.5 - 45 = 38.5
122 - 83.5 = 38.5
As you can see, the halfway number is 38.5 higher than 45 and 38.5 lower than 122. Therefore, our halfway between answer of 83.5 above is correct.
Halfway Between
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Halfway Between 45 and 123
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