When you ask "What number is halfway between 70 and 855?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=70 and Y=855.
To find the number halfway between 70 and 855, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 855 into our formula, we get:
(70 + 855)/2 = 462.5
Thus, the number halfway between 70 and 855 is 462.5.
To check that our answer is correct, we subtract 70 from 462.5 and subtract 462.5 from 855 and compare the two numbers:
462.5 - 70 = 392.5
855 - 462.5 = 392.5
As you can see, the halfway number is 392.5 higher than 70 and 392.5 lower than 855. Therefore, our halfway between answer of 462.5 above is correct.
Halfway Between
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Halfway Between 70 and 856
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