When you ask "What number is halfway between 79 and 780?" 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=780.
To find the number halfway between 79 and 780, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 780 into our formula, we get:
(79 + 780)/2 = 429.5
Thus, the number halfway between 79 and 780 is 429.5.
To check that our answer is correct, we subtract 79 from 429.5 and subtract 429.5 from 780 and compare the two numbers:
429.5 - 79 = 350.5
780 - 429.5 = 350.5
As you can see, the halfway number is 350.5 higher than 79 and 350.5 lower than 780. Therefore, our halfway between answer of 429.5 above is correct.
Halfway Between
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