When you ask "What number is halfway between 42 and 634?" 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=634.
To find the number halfway between 42 and 634, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 634 into our formula, we get:
(42 + 634)/2 = 338
Thus, the number halfway between 42 and 634 is 338.
To check that our answer is correct, we subtract 42 from 338 and subtract 338 from 634 and compare the two numbers:
338 - 42 = 296
634 - 338 = 296
As you can see, the halfway number is 296 higher than 42 and 296 lower than 634. Therefore, our halfway between answer of 338 above is correct.
Halfway Between
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Halfway Between 42 and 635
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