When you ask "What number is halfway between 71 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=71 and Y=310.
To find the number halfway between 71 and 310, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 310 into our formula, we get:
(71 + 310)/2 = 190.5
Thus, the number halfway between 71 and 310 is 190.5.
To check that our answer is correct, we subtract 71 from 190.5 and subtract 190.5 from 310 and compare the two numbers:
190.5 - 71 = 119.5
310 - 190.5 = 119.5
As you can see, the halfway number is 119.5 higher than 71 and 119.5 lower than 310. Therefore, our halfway between answer of 190.5 above is correct.
Halfway Between
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Halfway Between 71 and 311
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