When you ask "What number is halfway between 99 and 553?" 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=553.
To find the number halfway between 99 and 553, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 553 into our formula, we get:
(99 + 553)/2 = 326
Thus, the number halfway between 99 and 553 is 326.
To check that our answer is correct, we subtract 99 from 326 and subtract 326 from 553 and compare the two numbers:
326 - 99 = 227
553 - 326 = 227
As you can see, the halfway number is 227 higher than 99 and 227 lower than 553. Therefore, our halfway between answer of 326 above is correct.
Halfway Between
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Halfway Between 99 and 554
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