When you ask "What number is halfway between 42 and 917?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=917.
To find the number halfway between 42 and 917, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 917 into our formula, we get:
(42 + 917)/2 = 479.5
Thus, the number halfway between 42 and 917 is 479.5.
To check that our answer is correct, we subtract 42 from 479.5 and subtract 479.5 from 917 and compare the two numbers:
479.5 - 42 = 437.5
917 - 479.5 = 437.5
As you can see, the halfway number is 437.5 higher than 42 and 437.5 lower than 917. Therefore, our halfway between answer of 479.5 above is correct.
Halfway Between
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Halfway Between 42 and 918
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