When you ask "What number is halfway between 42 and 859?" 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=859.
To find the number halfway between 42 and 859, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 859 into our formula, we get:
(42 + 859)/2 = 450.5
Thus, the number halfway between 42 and 859 is 450.5.
To check that our answer is correct, we subtract 42 from 450.5 and subtract 450.5 from 859 and compare the two numbers:
450.5 - 42 = 408.5
859 - 450.5 = 408.5
As you can see, the halfway number is 408.5 higher than 42 and 408.5 lower than 859. Therefore, our halfway between answer of 450.5 above is correct.
Halfway Between
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Halfway Between 42 and 860
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