When you ask "What number is halfway between 2 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=2 and Y=128.
To find the number halfway between 2 and 128, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 2 and 128 into our formula, we get:
(2 + 128)/2 = 65
Thus, the number halfway between 2 and 128 is 65.
To check that our answer is correct, we subtract 2 from 65 and subtract 65 from 128 and compare the two numbers:
65 - 2 = 63
128 - 65 = 63
As you can see, the halfway number is 63 higher than 2 and 63 lower than 128. Therefore, our halfway between answer of 65 above is correct.
Halfway Between
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Halfway Between 2 and 129
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