When you ask "What number is halfway between 42 and 395?" 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=395.
To find the number halfway between 42 and 395, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 395 into our formula, we get:
(42 + 395)/2 = 218.5
Thus, the number halfway between 42 and 395 is 218.5.
To check that our answer is correct, we subtract 42 from 218.5 and subtract 218.5 from 395 and compare the two numbers:
218.5 - 42 = 176.5
395 - 218.5 = 176.5
As you can see, the halfway number is 176.5 higher than 42 and 176.5 lower than 395. Therefore, our halfway between answer of 218.5 above is correct.
Halfway Between
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Halfway Between 42 and 396
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