When you ask "What number is halfway between 42 and 83?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=83.
To find the number halfway between 42 and 83, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 83 into our formula, we get:
(42 + 83)/2 = 62.5
Thus, the number halfway between 42 and 83 is 62.5.
To check that our answer is correct, we subtract 42 from 62.5 and subtract 62.5 from 83 and compare the two numbers:
62.5 - 42 = 20.5
83 - 62.5 = 20.5
As you can see, the halfway number is 20.5 higher than 42 and 20.5 lower than 83. Therefore, our halfway between answer of 62.5 above is correct.
Halfway Between
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Halfway Between 42 and 84
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