When you ask "What number is halfway between 4 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=4 and Y=987.
To find the number halfway between 4 and 987, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 987 into our formula, we get:
(4 + 987)/2 = 495.5
Thus, the number halfway between 4 and 987 is 495.5.
To check that our answer is correct, we subtract 4 from 495.5 and subtract 495.5 from 987 and compare the two numbers:
495.5 - 4 = 491.5
987 - 495.5 = 491.5
As you can see, the halfway number is 491.5 higher than 4 and 491.5 lower than 987. Therefore, our halfway between answer of 495.5 above is correct.
Halfway Between
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Halfway Between 4 and 988
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