When you ask "What number is halfway between 68 and 789?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=68 and Y=789.
To find the number halfway between 68 and 789, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 789 into our formula, we get:
(68 + 789)/2 = 428.5
Thus, the number halfway between 68 and 789 is 428.5.
To check that our answer is correct, we subtract 68 from 428.5 and subtract 428.5 from 789 and compare the two numbers:
428.5 - 68 = 360.5
789 - 428.5 = 360.5
As you can see, the halfway number is 360.5 higher than 68 and 360.5 lower than 789. Therefore, our halfway between answer of 428.5 above is correct.
Halfway Between
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Halfway Between 68 and 790
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