When you ask "What number is halfway between 42 and 825?" 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=825.
To find the number halfway between 42 and 825, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 825 into our formula, we get:
(42 + 825)/2 = 433.5
Thus, the number halfway between 42 and 825 is 433.5.
To check that our answer is correct, we subtract 42 from 433.5 and subtract 433.5 from 825 and compare the two numbers:
433.5 - 42 = 391.5
825 - 433.5 = 391.5
As you can see, the halfway number is 391.5 higher than 42 and 391.5 lower than 825. Therefore, our halfway between answer of 433.5 above is correct.
Halfway Between
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Halfway Between 42 and 826
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