When you ask "What number is halfway between 98 and 311?" 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=311.
To find the number halfway between 98 and 311, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 98 and 311 into our formula, we get:
(98 + 311)/2 = 204.5
Thus, the number halfway between 98 and 311 is 204.5.
To check that our answer is correct, we subtract 98 from 204.5 and subtract 204.5 from 311 and compare the two numbers:
204.5 - 98 = 106.5
311 - 204.5 = 106.5
As you can see, the halfway number is 106.5 higher than 98 and 106.5 lower than 311. Therefore, our halfway between answer of 204.5 above is correct.
Halfway Between
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Halfway Between 98 and 312
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