
When you ask "What number is halfway between 2 and 978?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=2 and Y=978.

To find the number halfway between 2 and 978, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 2 and 978 into our formula, we get:
(2 + 978)/2 = 490
Thus, the number halfway between 2 and 978 is 490.
To check that our answer is correct, we subtract 2 from 490 and subtract 490 from 978 and compare the two numbers:
490 - 2 = 488
978 - 490 = 488
As you can see, the halfway number is 488 higher than 2 and 488 lower than 978. Therefore, our halfway between answer of 490 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 2 and 979
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