When you ask "What number is halfway between 34 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=34 and Y=128.
To find the number halfway between 34 and 128, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 34 and 128 into our formula, we get:
(34 + 128)/2 = 81
Thus, the number halfway between 34 and 128 is 81.
To check that our answer is correct, we subtract 34 from 81 and subtract 81 from 128 and compare the two numbers:
81 - 34 = 47
128 - 81 = 47
As you can see, the halfway number is 47 higher than 34 and 47 lower than 128. Therefore, our halfway between answer of 81 above is correct.
Halfway Between
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Halfway Between 34 and 129
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