When you ask "What number is halfway between 42 and 646?" 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=646.
To find the number halfway between 42 and 646, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 646 into our formula, we get:
(42 + 646)/2 = 344
Thus, the number halfway between 42 and 646 is 344.
To check that our answer is correct, we subtract 42 from 344 and subtract 344 from 646 and compare the two numbers:
344 - 42 = 302
646 - 344 = 302
As you can see, the halfway number is 302 higher than 42 and 302 lower than 646. Therefore, our halfway between answer of 344 above is correct.
Halfway Between
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Halfway Between 42 and 647
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