When you ask "What number is halfway between 51 and 790?" 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=790.
To find the number halfway between 51 and 790, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 790 into our formula, we get:
(51 + 790)/2 = 420.5
Thus, the number halfway between 51 and 790 is 420.5.
To check that our answer is correct, we subtract 51 from 420.5 and subtract 420.5 from 790 and compare the two numbers:
420.5 - 51 = 369.5
790 - 420.5 = 369.5
As you can see, the halfway number is 369.5 higher than 51 and 369.5 lower than 790. Therefore, our halfway between answer of 420.5 above is correct.
Halfway Between
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Halfway Between 51 and 791
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