When you ask "What number is halfway between 70 and 865?" 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=865.
To find the number halfway between 70 and 865, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 865 into our formula, we get:
(70 + 865)/2 = 467.5
Thus, the number halfway between 70 and 865 is 467.5.
To check that our answer is correct, we subtract 70 from 467.5 and subtract 467.5 from 865 and compare the two numbers:
467.5 - 70 = 397.5
865 - 467.5 = 397.5
As you can see, the halfway number is 397.5 higher than 70 and 397.5 lower than 865. Therefore, our halfway between answer of 467.5 above is correct.
Halfway Between
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