When you ask "What number is halfway between 68 and 831?" 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=831.
To find the number halfway between 68 and 831, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 831 into our formula, we get:
(68 + 831)/2 = 449.5
Thus, the number halfway between 68 and 831 is 449.5.
To check that our answer is correct, we subtract 68 from 449.5 and subtract 449.5 from 831 and compare the two numbers:
449.5 - 68 = 381.5
831 - 449.5 = 381.5
As you can see, the halfway number is 381.5 higher than 68 and 381.5 lower than 831. Therefore, our halfway between answer of 449.5 above is correct.
Halfway Between
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Halfway Between 68 and 832
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