When you ask "What number is halfway between 71 and 315?" 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=315.
To find the number halfway between 71 and 315, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 315 into our formula, we get:
(71 + 315)/2 = 193
Thus, the number halfway between 71 and 315 is 193.
To check that our answer is correct, we subtract 71 from 193 and subtract 193 from 315 and compare the two numbers:
193 - 71 = 122
315 - 193 = 122
As you can see, the halfway number is 122 higher than 71 and 122 lower than 315. Therefore, our halfway between answer of 193 above is correct.
Halfway Between
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Halfway Between 71 and 316
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