When you ask "What number is halfway between 98 and 987?" 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=987.
To find the number halfway between 98 and 987, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 98 and 987 into our formula, we get:
(98 + 987)/2 = 542.5
Thus, the number halfway between 98 and 987 is 542.5.
To check that our answer is correct, we subtract 98 from 542.5 and subtract 542.5 from 987 and compare the two numbers:
542.5 - 98 = 444.5
987 - 542.5 = 444.5
As you can see, the halfway number is 444.5 higher than 98 and 444.5 lower than 987. Therefore, our halfway between answer of 542.5 above is correct.
Halfway Between
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Halfway Between 98 and 988
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