When you ask "What number is halfway between 21 and 734?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=734.
To find the number halfway between 21 and 734, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 734 into our formula, we get:
(21 + 734)/2 = 377.5
Thus, the number halfway between 21 and 734 is 377.5.
To check that our answer is correct, we subtract 21 from 377.5 and subtract 377.5 from 734 and compare the two numbers:
377.5 - 21 = 356.5
734 - 377.5 = 356.5
As you can see, the halfway number is 356.5 higher than 21 and 356.5 lower than 734. Therefore, our halfway between answer of 377.5 above is correct.
Halfway Between
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Halfway Between 21 and 735
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