When you ask "What number is halfway between 8 and 128?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=8 and Y=128.
To find the number halfway between 8 and 128, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 128 into our formula, we get:
(8 + 128)/2 = 68
Thus, the number halfway between 8 and 128 is 68.
To check that our answer is correct, we subtract 8 from 68 and subtract 68 from 128 and compare the two numbers:
68 - 8 = 60
128 - 68 = 60
As you can see, the halfway number is 60 higher than 8 and 60 lower than 128. Therefore, our halfway between answer of 68 above is correct.
Halfway Between
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Halfway Between 8 and 129
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