When you ask "What number is halfway between 10 and 867?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=10 and Y=867.
To find the number halfway between 10 and 867, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 867 into our formula, we get:
(10 + 867)/2 = 438.5
Thus, the number halfway between 10 and 867 is 438.5.
To check that our answer is correct, we subtract 10 from 438.5 and subtract 438.5 from 867 and compare the two numbers:
438.5 - 10 = 428.5
867 - 438.5 = 428.5
As you can see, the halfway number is 428.5 higher than 10 and 428.5 lower than 867. Therefore, our halfway between answer of 438.5 above is correct.
Halfway Between
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Halfway Between 10 and 868
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