When you ask "What number is halfway between 42 and 931?" 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=931.
To find the number halfway between 42 and 931, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 931 into our formula, we get:
(42 + 931)/2 = 486.5
Thus, the number halfway between 42 and 931 is 486.5.
To check that our answer is correct, we subtract 42 from 486.5 and subtract 486.5 from 931 and compare the two numbers:
486.5 - 42 = 444.5
931 - 486.5 = 444.5
As you can see, the halfway number is 444.5 higher than 42 and 444.5 lower than 931. Therefore, our halfway between answer of 486.5 above is correct.
Halfway Between
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Halfway Between 42 and 932
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