When you ask "What number is halfway between 98 and 258?" 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=258.
To find the number halfway between 98 and 258, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 98 and 258 into our formula, we get:
(98 + 258)/2 = 178
Thus, the number halfway between 98 and 258 is 178.
To check that our answer is correct, we subtract 98 from 178 and subtract 178 from 258 and compare the two numbers:
178 - 98 = 80
258 - 178 = 80
As you can see, the halfway number is 80 higher than 98 and 80 lower than 258. Therefore, our halfway between answer of 178 above is correct.
Halfway Between
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Halfway Between 98 and 259
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