When you ask "What number is halfway between 79 and 778?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=79 and Y=778.
To find the number halfway between 79 and 778, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 778 into our formula, we get:
(79 + 778)/2 = 428.5
Thus, the number halfway between 79 and 778 is 428.5.
To check that our answer is correct, we subtract 79 from 428.5 and subtract 428.5 from 778 and compare the two numbers:
428.5 - 79 = 349.5
778 - 428.5 = 349.5
As you can see, the halfway number is 349.5 higher than 79 and 349.5 lower than 778. Therefore, our halfway between answer of 428.5 above is correct.
Halfway Between
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Halfway Between 79 and 779
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