When you ask "What number is halfway between 47 and 688?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=47 and Y=688.
To find the number halfway between 47 and 688, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 47 and 688 into our formula, we get:
(47 + 688)/2 = 367.5
Thus, the number halfway between 47 and 688 is 367.5.
To check that our answer is correct, we subtract 47 from 367.5 and subtract 367.5 from 688 and compare the two numbers:
367.5 - 47 = 320.5
688 - 367.5 = 320.5
As you can see, the halfway number is 320.5 higher than 47 and 320.5 lower than 688. Therefore, our halfway between answer of 367.5 above is correct.
Halfway Between
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