When you ask "What number is halfway between 7 and 850?" 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=850.
To find the number halfway between 7 and 850, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 850 into our formula, we get:
(7 + 850)/2 = 428.5
Thus, the number halfway between 7 and 850 is 428.5.
To check that our answer is correct, we subtract 7 from 428.5 and subtract 428.5 from 850 and compare the two numbers:
428.5 - 7 = 421.5
850 - 428.5 = 421.5
As you can see, the halfway number is 421.5 higher than 7 and 421.5 lower than 850. Therefore, our halfway between answer of 428.5 above is correct.
Halfway Between
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