When you ask "What number is halfway between 51 and 530?" 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=530.
To find the number halfway between 51 and 530, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 530 into our formula, we get:
(51 + 530)/2 = 290.5
Thus, the number halfway between 51 and 530 is 290.5.
To check that our answer is correct, we subtract 51 from 290.5 and subtract 290.5 from 530 and compare the two numbers:
290.5 - 51 = 239.5
530 - 290.5 = 239.5
As you can see, the halfway number is 239.5 higher than 51 and 239.5 lower than 530. Therefore, our halfway between answer of 290.5 above is correct.
Halfway Between
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Halfway Between 51 and 531
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