When you ask "What number is halfway between 4 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=4 and Y=311.
To find the number halfway between 4 and 311, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 311 into our formula, we get:
(4 + 311)/2 = 157.5
Thus, the number halfway between 4 and 311 is 157.5.
To check that our answer is correct, we subtract 4 from 157.5 and subtract 157.5 from 311 and compare the two numbers:
157.5 - 4 = 153.5
311 - 157.5 = 153.5
As you can see, the halfway number is 153.5 higher than 4 and 153.5 lower than 311. Therefore, our halfway between answer of 157.5 above is correct.
Halfway Between
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Halfway Between 4 and 312
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