When you ask "What number is halfway between 7 and 858?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=858.
To find the number halfway between 7 and 858, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 858 into our formula, we get:
(7 + 858)/2 = 432.5
Thus, the number halfway between 7 and 858 is 432.5.
To check that our answer is correct, we subtract 7 from 432.5 and subtract 432.5 from 858 and compare the two numbers:
432.5 - 7 = 425.5
858 - 432.5 = 425.5
As you can see, the halfway number is 425.5 higher than 7 and 425.5 lower than 858. Therefore, our halfway between answer of 432.5 above is correct.
Halfway Between
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Halfway Between 7 and 859
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