When you ask "What number is halfway between 42 and 799?" 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=799.
To find the number halfway between 42 and 799, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 799 into our formula, we get:
(42 + 799)/2 = 420.5
Thus, the number halfway between 42 and 799 is 420.5.
To check that our answer is correct, we subtract 42 from 420.5 and subtract 420.5 from 799 and compare the two numbers:
420.5 - 42 = 378.5
799 - 420.5 = 378.5
As you can see, the halfway number is 378.5 higher than 42 and 378.5 lower than 799. Therefore, our halfway between answer of 420.5 above is correct.
Halfway Between
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