When you ask "What number is halfway between 21 and 746?" 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=746.
To find the number halfway between 21 and 746, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 746 into our formula, we get:
(21 + 746)/2 = 383.5
Thus, the number halfway between 21 and 746 is 383.5.
To check that our answer is correct, we subtract 21 from 383.5 and subtract 383.5 from 746 and compare the two numbers:
383.5 - 21 = 362.5
746 - 383.5 = 362.5
As you can see, the halfway number is 362.5 higher than 21 and 362.5 lower than 746. Therefore, our halfway between answer of 383.5 above is correct.
Halfway Between
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Halfway Between 21 and 747
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