When you ask "What number is halfway between 42 and 63?" 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=63.
To find the number halfway between 42 and 63, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 63 into our formula, we get:
(42 + 63)/2 = 52.5
Thus, the number halfway between 42 and 63 is 52.5.
To check that our answer is correct, we subtract 42 from 52.5 and subtract 52.5 from 63 and compare the two numbers:
52.5 - 42 = 10.5
63 - 52.5 = 10.5
As you can see, the halfway number is 10.5 higher than 42 and 10.5 lower than 63. Therefore, our halfway between answer of 52.5 above is correct.
Halfway Between
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Halfway Between 42 and 64
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