When you ask "What number is halfway between 42 and 845?" 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=845.
To find the number halfway between 42 and 845, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 845 into our formula, we get:
(42 + 845)/2 = 443.5
Thus, the number halfway between 42 and 845 is 443.5.
To check that our answer is correct, we subtract 42 from 443.5 and subtract 443.5 from 845 and compare the two numbers:
443.5 - 42 = 401.5
845 - 443.5 = 401.5
As you can see, the halfway number is 401.5 higher than 42 and 401.5 lower than 845. Therefore, our halfway between answer of 443.5 above is correct.
Halfway Between
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Halfway Between 42 and 846
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