When you ask "What number is halfway between 7 and 12?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=12.
To find the number halfway between 7 and 12, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 12 into our formula, we get:
(7 + 12)/2 = 9.5
Thus, the number halfway between 7 and 12 is 9.5.
To check that our answer is correct, we subtract 7 from 9.5 and subtract 9.5 from 12 and compare the two numbers:
9.5 - 7 = 2.5
12 - 9.5 = 2.5
As you can see, the halfway number is 2.5 higher than 7 and 2.5 lower than 12. Therefore, our halfway between answer of 9.5 above is correct.
Halfway Between
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