When you ask "What number is halfway between 68 and 321?" 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=321.
To find the number halfway between 68 and 321, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 321 into our formula, we get:
(68 + 321)/2 = 194.5
Thus, the number halfway between 68 and 321 is 194.5.
To check that our answer is correct, we subtract 68 from 194.5 and subtract 194.5 from 321 and compare the two numbers:
194.5 - 68 = 126.5
321 - 194.5 = 126.5
As you can see, the halfway number is 126.5 higher than 68 and 126.5 lower than 321. Therefore, our halfway between answer of 194.5 above is correct.
Halfway Between
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Halfway Between 68 and 322
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