When you ask "What number is halfway between 98 and 513?" 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=513.
To find the number halfway between 98 and 513, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 98 and 513 into our formula, we get:
(98 + 513)/2 = 305.5
Thus, the number halfway between 98 and 513 is 305.5.
To check that our answer is correct, we subtract 98 from 305.5 and subtract 305.5 from 513 and compare the two numbers:
305.5 - 98 = 207.5
513 - 305.5 = 207.5
As you can see, the halfway number is 207.5 higher than 98 and 207.5 lower than 513. Therefore, our halfway between answer of 305.5 above is correct.
Halfway Between
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Halfway Between 98 and 514
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