When you ask "What number is halfway between 42 and 457?" 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=457.
To find the number halfway between 42 and 457, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 457 into our formula, we get:
(42 + 457)/2 = 249.5
Thus, the number halfway between 42 and 457 is 249.5.
To check that our answer is correct, we subtract 42 from 249.5 and subtract 249.5 from 457 and compare the two numbers:
249.5 - 42 = 207.5
457 - 249.5 = 207.5
As you can see, the halfway number is 207.5 higher than 42 and 207.5 lower than 457. Therefore, our halfway between answer of 249.5 above is correct.
Halfway Between
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Halfway Between 42 and 458
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