When you ask "What number is halfway between 55 and 98?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=55 and Y=98.
To find the number halfway between 55 and 98, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 98 into our formula, we get:
(55 + 98)/2 = 76.5
Thus, the number halfway between 55 and 98 is 76.5.
To check that our answer is correct, we subtract 55 from 76.5 and subtract 76.5 from 98 and compare the two numbers:
76.5 - 55 = 21.5
98 - 76.5 = 21.5
As you can see, the halfway number is 21.5 higher than 55 and 21.5 lower than 98. Therefore, our halfway between answer of 76.5 above is correct.
Halfway Between
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Halfway Between 55 and 99
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