When you ask "What number is halfway between 69 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=69 and Y=615.
To find the number halfway between 69 and 615, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 615 into our formula, we get:
(69 + 615)/2 = 342
Thus, the number halfway between 69 and 615 is 342.
To check that our answer is correct, we subtract 69 from 342 and subtract 342 from 615 and compare the two numbers:
342 - 69 = 273
615 - 342 = 273
As you can see, the halfway number is 273 higher than 69 and 273 lower than 615. Therefore, our halfway between answer of 342 above is correct.
Halfway Between
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Halfway Between 69 and 616
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