When you ask "What number is halfway between 78 and 722?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=78 and Y=722.
To find the number halfway between 78 and 722, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 78 and 722 into our formula, we get:
(78 + 722)/2 = 400
Thus, the number halfway between 78 and 722 is 400.
To check that our answer is correct, we subtract 78 from 400 and subtract 400 from 722 and compare the two numbers:
400 - 78 = 322
722 - 400 = 322
As you can see, the halfway number is 322 higher than 78 and 322 lower than 722. Therefore, our halfway between answer of 400 above is correct.
Halfway Between
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Halfway Between 78 and 723
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