When you ask "What number is halfway between 15 and 297?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=297.
To find the number halfway between 15 and 297, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 297 into our formula, we get:
(15 + 297)/2 = 156
Thus, the number halfway between 15 and 297 is 156.
To check that our answer is correct, we subtract 15 from 156 and subtract 156 from 297 and compare the two numbers:
156 - 15 = 141
297 - 156 = 141
As you can see, the halfway number is 141 higher than 15 and 141 lower than 297. Therefore, our halfway between answer of 156 above is correct.
Halfway Between
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Halfway Between 15 and 298
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