When you ask "What number is halfway between 98 and 877?" 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=877.
To find the number halfway between 98 and 877, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 98 and 877 into our formula, we get:
(98 + 877)/2 = 487.5
Thus, the number halfway between 98 and 877 is 487.5.
To check that our answer is correct, we subtract 98 from 487.5 and subtract 487.5 from 877 and compare the two numbers:
487.5 - 98 = 389.5
877 - 487.5 = 389.5
As you can see, the halfway number is 389.5 higher than 98 and 389.5 lower than 877. Therefore, our halfway between answer of 487.5 above is correct.
Halfway Between
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Halfway Between 98 and 878
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