When you ask "What number is halfway between 51 and 720?" 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=720.
To find the number halfway between 51 and 720, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 720 into our formula, we get:
(51 + 720)/2 = 385.5
Thus, the number halfway between 51 and 720 is 385.5.
To check that our answer is correct, we subtract 51 from 385.5 and subtract 385.5 from 720 and compare the two numbers:
385.5 - 51 = 334.5
720 - 385.5 = 334.5
As you can see, the halfway number is 334.5 higher than 51 and 334.5 lower than 720. Therefore, our halfway between answer of 385.5 above is correct.
Halfway Between
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