When you ask "What number is halfway between 77 and 742?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=77 and Y=742.
To find the number halfway between 77 and 742, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 742 into our formula, we get:
(77 + 742)/2 = 409.5
Thus, the number halfway between 77 and 742 is 409.5.
To check that our answer is correct, we subtract 77 from 409.5 and subtract 409.5 from 742 and compare the two numbers:
409.5 - 77 = 332.5
742 - 409.5 = 332.5
As you can see, the halfway number is 332.5 higher than 77 and 332.5 lower than 742. Therefore, our halfway between answer of 409.5 above is correct.
Halfway Between
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Halfway Between 77 and 743
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