When you ask "What number is halfway between 77 and 988?" 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=988.
To find the number halfway between 77 and 988, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 988 into our formula, we get:
(77 + 988)/2 = 532.5
Thus, the number halfway between 77 and 988 is 532.5.
To check that our answer is correct, we subtract 77 from 532.5 and subtract 532.5 from 988 and compare the two numbers:
532.5 - 77 = 455.5
988 - 532.5 = 455.5
As you can see, the halfway number is 455.5 higher than 77 and 455.5 lower than 988. Therefore, our halfway between answer of 532.5 above is correct.
Halfway Between
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Halfway Between 77 and 989
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