When you ask "What number is halfway between 15 and 862?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=862.
To find the number halfway between 15 and 862, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 862 into our formula, we get:
(15 + 862)/2 = 438.5
Thus, the number halfway between 15 and 862 is 438.5.
To check that our answer is correct, we subtract 15 from 438.5 and subtract 438.5 from 862 and compare the two numbers:
438.5 - 15 = 423.5
862 - 438.5 = 423.5
As you can see, the halfway number is 423.5 higher than 15 and 423.5 lower than 862. Therefore, our halfway between answer of 438.5 above is correct.
Halfway Between
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Halfway Between 15 and 863
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