When you ask "What number is halfway between 98 and 309?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=98 and Y=309.
To find the number halfway between 98 and 309, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 98 and 309 into our formula, we get:
(98 + 309)/2 = 203.5
Thus, the number halfway between 98 and 309 is 203.5.
To check that our answer is correct, we subtract 98 from 203.5 and subtract 203.5 from 309 and compare the two numbers:
203.5 - 98 = 105.5
309 - 203.5 = 105.5
As you can see, the halfway number is 105.5 higher than 98 and 105.5 lower than 309. Therefore, our halfway between answer of 203.5 above is correct.
Halfway Between
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Halfway Between 98 and 310
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