When you ask "What number is halfway between 3 and 310?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=3 and Y=310.
To find the number halfway between 3 and 310, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 310 into our formula, we get:
(3 + 310)/2 = 156.5
Thus, the number halfway between 3 and 310 is 156.5.
To check that our answer is correct, we subtract 3 from 156.5 and subtract 156.5 from 310 and compare the two numbers:
156.5 - 3 = 153.5
310 - 156.5 = 153.5
As you can see, the halfway number is 153.5 higher than 3 and 153.5 lower than 310. Therefore, our halfway between answer of 156.5 above is correct.
Halfway Between
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Halfway Between 3 and 311
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