When you ask "What number is halfway between 7 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=7 and Y=615.
To find the number halfway between 7 and 615, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 615 into our formula, we get:
(7 + 615)/2 = 311
Thus, the number halfway between 7 and 615 is 311.
To check that our answer is correct, we subtract 7 from 311 and subtract 311 from 615 and compare the two numbers:
311 - 7 = 304
615 - 311 = 304
As you can see, the halfway number is 304 higher than 7 and 304 lower than 615. Therefore, our halfway between answer of 311 above is correct.
Halfway Between
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Halfway Between 7 and 616
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