When you ask "What number is halfway between 98 and 641?" 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=641.
To find the number halfway between 98 and 641, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 98 and 641 into our formula, we get:
(98 + 641)/2 = 369.5
Thus, the number halfway between 98 and 641 is 369.5.
To check that our answer is correct, we subtract 98 from 369.5 and subtract 369.5 from 641 and compare the two numbers:
369.5 - 98 = 271.5
641 - 369.5 = 271.5
As you can see, the halfway number is 271.5 higher than 98 and 271.5 lower than 641. Therefore, our halfway between answer of 369.5 above is correct.
Halfway Between
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Halfway Between 98 and 642
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