When you ask "What number is halfway between 99 and 605?" 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=605.
To find the number halfway between 99 and 605, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 605 into our formula, we get:
(99 + 605)/2 = 352
Thus, the number halfway between 99 and 605 is 352.
To check that our answer is correct, we subtract 99 from 352 and subtract 352 from 605 and compare the two numbers:
352 - 99 = 253
605 - 352 = 253
As you can see, the halfway number is 253 higher than 99 and 253 lower than 605. Therefore, our halfway between answer of 352 above is correct.
Halfway Between
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Halfway Between 99 and 606
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