When you ask "What number is halfway between 42 and 625?" 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=625.
To find the number halfway between 42 and 625, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 625 into our formula, we get:
(42 + 625)/2 = 333.5
Thus, the number halfway between 42 and 625 is 333.5.
To check that our answer is correct, we subtract 42 from 333.5 and subtract 333.5 from 625 and compare the two numbers:
333.5 - 42 = 291.5
625 - 333.5 = 291.5
As you can see, the halfway number is 291.5 higher than 42 and 291.5 lower than 625. Therefore, our halfway between answer of 333.5 above is correct.
Halfway Between
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Halfway Between 42 and 626
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