When you ask "What number is halfway between 61 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=61 and Y=128.
To find the number halfway between 61 and 128, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 61 and 128 into our formula, we get:
(61 + 128)/2 = 94.5
Thus, the number halfway between 61 and 128 is 94.5.
To check that our answer is correct, we subtract 61 from 94.5 and subtract 94.5 from 128 and compare the two numbers:
94.5 - 61 = 33.5
128 - 94.5 = 33.5
As you can see, the halfway number is 33.5 higher than 61 and 33.5 lower than 128. Therefore, our halfway between answer of 94.5 above is correct.
Halfway Between
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Halfway Between 61 and 129
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