When you ask "What number is halfway between 69 and 729?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=69 and Y=729.
To find the number halfway between 69 and 729, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 729 into our formula, we get:
(69 + 729)/2 = 399
Thus, the number halfway between 69 and 729 is 399.
To check that our answer is correct, we subtract 69 from 399 and subtract 399 from 729 and compare the two numbers:
399 - 69 = 330
729 - 399 = 330
As you can see, the halfway number is 330 higher than 69 and 330 lower than 729. Therefore, our halfway between answer of 399 above is correct.
Halfway Between
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Halfway Between 69 and 730
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