When you ask "What number is halfway between 51 and 988?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=51 and Y=988.
To find the number halfway between 51 and 988, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 988 into our formula, we get:
(51 + 988)/2 = 519.5
Thus, the number halfway between 51 and 988 is 519.5.
To check that our answer is correct, we subtract 51 from 519.5 and subtract 519.5 from 988 and compare the two numbers:
519.5 - 51 = 468.5
988 - 519.5 = 468.5
As you can see, the halfway number is 468.5 higher than 51 and 468.5 lower than 988. Therefore, our halfway between answer of 519.5 above is correct.
Halfway Between
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Halfway Between 51 and 989
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