When you ask "What number is halfway between 42 and 905?" 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=905.
To find the number halfway between 42 and 905, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 905 into our formula, we get:
(42 + 905)/2 = 473.5
Thus, the number halfway between 42 and 905 is 473.5.
To check that our answer is correct, we subtract 42 from 473.5 and subtract 473.5 from 905 and compare the two numbers:
473.5 - 42 = 431.5
905 - 473.5 = 431.5
As you can see, the halfway number is 431.5 higher than 42 and 431.5 lower than 905. Therefore, our halfway between answer of 473.5 above is correct.
Halfway Between
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Halfway Between 42 and 906
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