When you ask "What number is halfway between 11 and 615?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=11 and Y=615.
To find the number halfway between 11 and 615, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 615 into our formula, we get:
(11 + 615)/2 = 313
Thus, the number halfway between 11 and 615 is 313.
To check that our answer is correct, we subtract 11 from 313 and subtract 313 from 615 and compare the two numbers:
313 - 11 = 302
615 - 313 = 302
As you can see, the halfway number is 302 higher than 11 and 302 lower than 615. Therefore, our halfway between answer of 313 above is correct.
Halfway Between
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Halfway Between 11 and 616
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