When you ask "What number is halfway between 7 and 66?" 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=66.
To find the number halfway between 7 and 66, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 66 into our formula, we get:
(7 + 66)/2 = 36.5
Thus, the number halfway between 7 and 66 is 36.5.
To check that our answer is correct, we subtract 7 from 36.5 and subtract 36.5 from 66 and compare the two numbers:
36.5 - 7 = 29.5
66 - 36.5 = 29.5
As you can see, the halfway number is 29.5 higher than 7 and 29.5 lower than 66. Therefore, our halfway between answer of 36.5 above is correct.
Halfway Between
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Halfway Between 7 and 67
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