When you ask "What number is halfway between 64 and 311?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=64 and Y=311.
To find the number halfway between 64 and 311, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 64 and 311 into our formula, we get:
(64 + 311)/2 = 187.5
Thus, the number halfway between 64 and 311 is 187.5.
To check that our answer is correct, we subtract 64 from 187.5 and subtract 187.5 from 311 and compare the two numbers:
187.5 - 64 = 123.5
311 - 187.5 = 123.5
As you can see, the halfway number is 123.5 higher than 64 and 123.5 lower than 311. Therefore, our halfway between answer of 187.5 above is correct.
Halfway Between
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Halfway Between 64 and 312
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