When you ask "What number is halfway between 42 and 899?" 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=899.
To find the number halfway between 42 and 899, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 899 into our formula, we get:
(42 + 899)/2 = 470.5
Thus, the number halfway between 42 and 899 is 470.5.
To check that our answer is correct, we subtract 42 from 470.5 and subtract 470.5 from 899 and compare the two numbers:
470.5 - 42 = 428.5
899 - 470.5 = 428.5
As you can see, the halfway number is 428.5 higher than 42 and 428.5 lower than 899. Therefore, our halfway between answer of 470.5 above is correct.
Halfway Between
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Halfway Between 42 and 900
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