When you ask "What number is halfway between 68 and 423?" 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=423.
To find the number halfway between 68 and 423, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 423 into our formula, we get:
(68 + 423)/2 = 245.5
Thus, the number halfway between 68 and 423 is 245.5.
To check that our answer is correct, we subtract 68 from 245.5 and subtract 245.5 from 423 and compare the two numbers:
245.5 - 68 = 177.5
423 - 245.5 = 177.5
As you can see, the halfway number is 177.5 higher than 68 and 177.5 lower than 423. Therefore, our halfway between answer of 245.5 above is correct.
Halfway Between
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Halfway Between 68 and 424
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