When you ask "What number is halfway between 50 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=50 and Y=128.
To find the number halfway between 50 and 128, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 50 and 128 into our formula, we get:
(50 + 128)/2 = 89
Thus, the number halfway between 50 and 128 is 89.
To check that our answer is correct, we subtract 50 from 89 and subtract 89 from 128 and compare the two numbers:
89 - 50 = 39
128 - 89 = 39
As you can see, the halfway number is 39 higher than 50 and 39 lower than 128. Therefore, our halfway between answer of 89 above is correct.
Halfway Between
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Halfway Between 50 and 129
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