When you ask "What number is halfway between 42 and 305?" 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=305.
To find the number halfway between 42 and 305, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 305 into our formula, we get:
(42 + 305)/2 = 173.5
Thus, the number halfway between 42 and 305 is 173.5.
To check that our answer is correct, we subtract 42 from 173.5 and subtract 173.5 from 305 and compare the two numbers:
173.5 - 42 = 131.5
305 - 173.5 = 131.5
As you can see, the halfway number is 131.5 higher than 42 and 131.5 lower than 305. Therefore, our halfway between answer of 173.5 above is correct.
Halfway Between
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Halfway Between 42 and 306
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