When you ask "What number is halfway between 68 and 218?" 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=218.
To find the number halfway between 68 and 218, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 218 into our formula, we get:
(68 + 218)/2 = 143
Thus, the number halfway between 68 and 218 is 143.
To check that our answer is correct, we subtract 68 from 143 and subtract 143 from 218 and compare the two numbers:
143 - 68 = 75
218 - 143 = 75
As you can see, the halfway number is 75 higher than 68 and 75 lower than 218. Therefore, our halfway between answer of 143 above is correct.
Halfway Between
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Halfway Between 68 and 219
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