
When you ask "What number is halfway between 56 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=56 and Y=128.

To find the number halfway between 56 and 128, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 56 and 128 into our formula, we get:
(56 + 128)/2 = 92
Thus, the number halfway between 56 and 128 is 92.
To check that our answer is correct, we subtract 56 from 92 and subtract 92 from 128 and compare the two numbers:
92 - 56 = 36
128 - 92 = 36
As you can see, the halfway number is 36 higher than 56 and 36 lower than 128. Therefore, our halfway between answer of 92 above is correct.
Halfway Between
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Halfway Between 56 and 129
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