When you ask "What number is halfway between 64 and 129?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=64 and Y=129.
To find the number halfway between 64 and 129, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 64 and 129 into our formula, we get:
(64 + 129)/2 = 96.5
Thus, the number halfway between 64 and 129 is 96.5.
To check that our answer is correct, we subtract 64 from 96.5 and subtract 96.5 from 129 and compare the two numbers:
96.5 - 64 = 32.5
129 - 96.5 = 32.5
As you can see, the halfway number is 32.5 higher than 64 and 32.5 lower than 129. Therefore, our halfway between answer of 96.5 above is correct.
Halfway Between
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Halfway Between 64 and 130
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