When you ask "What number is halfway between 70 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=70 and Y=315.
To find the number halfway between 70 and 315, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 315 into our formula, we get:
(70 + 315)/2 = 192.5
Thus, the number halfway between 70 and 315 is 192.5.
To check that our answer is correct, we subtract 70 from 192.5 and subtract 192.5 from 315 and compare the two numbers:
192.5 - 70 = 122.5
315 - 192.5 = 122.5
As you can see, the halfway number is 122.5 higher than 70 and 122.5 lower than 315. Therefore, our halfway between answer of 192.5 above is correct.
Halfway Between
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Halfway Between 70 and 316
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