When you ask "What number is halfway between 81 and 738?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=81 and Y=738.
To find the number halfway between 81 and 738, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 738 into our formula, we get:
(81 + 738)/2 = 409.5
Thus, the number halfway between 81 and 738 is 409.5.
To check that our answer is correct, we subtract 81 from 409.5 and subtract 409.5 from 738 and compare the two numbers:
409.5 - 81 = 328.5
738 - 409.5 = 328.5
As you can see, the halfway number is 328.5 higher than 81 and 328.5 lower than 738. Therefore, our halfway between answer of 409.5 above is correct.
Halfway Between
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Halfway Between 81 and 739
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