When you ask "What number is halfway between 42 and 807?" 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=807.
To find the number halfway between 42 and 807, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 807 into our formula, we get:
(42 + 807)/2 = 424.5
Thus, the number halfway between 42 and 807 is 424.5.
To check that our answer is correct, we subtract 42 from 424.5 and subtract 424.5 from 807 and compare the two numbers:
424.5 - 42 = 382.5
807 - 424.5 = 382.5
As you can see, the halfway number is 382.5 higher than 42 and 382.5 lower than 807. Therefore, our halfway between answer of 424.5 above is correct.
Halfway Between
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Halfway Between 42 and 808
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