When you ask "What number is halfway between 10 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=10 and Y=615.
To find the number halfway between 10 and 615, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 615 into our formula, we get:
(10 + 615)/2 = 312.5
Thus, the number halfway between 10 and 615 is 312.5.
To check that our answer is correct, we subtract 10 from 312.5 and subtract 312.5 from 615 and compare the two numbers:
312.5 - 10 = 302.5
615 - 312.5 = 302.5
As you can see, the halfway number is 302.5 higher than 10 and 302.5 lower than 615. Therefore, our halfway between answer of 312.5 above is correct.
Halfway Between
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Halfway Between 10 and 616
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