When you ask "What number is halfway between 49 and 644?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=49 and Y=644.
To find the number halfway between 49 and 644, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 49 and 644 into our formula, we get:
(49 + 644)/2 = 346.5
Thus, the number halfway between 49 and 644 is 346.5.
To check that our answer is correct, we subtract 49 from 346.5 and subtract 346.5 from 644 and compare the two numbers:
346.5 - 49 = 297.5
644 - 346.5 = 297.5
As you can see, the halfway number is 297.5 higher than 49 and 297.5 lower than 644. Therefore, our halfway between answer of 346.5 above is correct.
Halfway Between
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Halfway Between 49 and 645
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