When you ask "What number is halfway between 3 and 42?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=3 and Y=42.
To find the number halfway between 3 and 42, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 42 into our formula, we get:
(3 + 42)/2 = 22.5
Thus, the number halfway between 3 and 42 is 22.5.
To check that our answer is correct, we subtract 3 from 22.5 and subtract 22.5 from 42 and compare the two numbers:
22.5 - 3 = 19.5
42 - 22.5 = 19.5
As you can see, the halfway number is 19.5 higher than 3 and 19.5 lower than 42. Therefore, our halfway between answer of 22.5 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 3 and 43
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