When you ask "What number is halfway between 99 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=99 and Y=552.
To find the number halfway between 99 and 552, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 552 into our formula, we get:
(99 + 552)/2 = 325.5
Thus, the number halfway between 99 and 552 is 325.5.
To check that our answer is correct, we subtract 99 from 325.5 and subtract 325.5 from 552 and compare the two numbers:
325.5 - 99 = 226.5
552 - 325.5 = 226.5
As you can see, the halfway number is 226.5 higher than 99 and 226.5 lower than 552. Therefore, our halfway between answer of 325.5 above is correct.
Halfway Between
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Halfway Between 99 and 553
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