When you ask "What number is halfway between 15 and 552?" 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=552.
To find the number halfway between 15 and 552, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 552 into our formula, we get:
(15 + 552)/2 = 283.5
Thus, the number halfway between 15 and 552 is 283.5.
To check that our answer is correct, we subtract 15 from 283.5 and subtract 283.5 from 552 and compare the two numbers:
283.5 - 15 = 268.5
552 - 283.5 = 268.5
As you can see, the halfway number is 268.5 higher than 15 and 268.5 lower than 552. Therefore, our halfway between answer of 283.5 above is correct.
Halfway Between
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Halfway Between 15 and 553
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