When you ask "What number is halfway between 68 and 79?" 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=79.
To find the number halfway between 68 and 79, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 79 into our formula, we get:
(68 + 79)/2 = 73.5
Thus, the number halfway between 68 and 79 is 73.5.
To check that our answer is correct, we subtract 68 from 73.5 and subtract 73.5 from 79 and compare the two numbers:
73.5 - 68 = 5.5
79 - 73.5 = 5.5
As you can see, the halfway number is 5.5 higher than 68 and 5.5 lower than 79. Therefore, our halfway between answer of 73.5 above is correct.
Halfway Between
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