When you ask "What number is halfway between 64 and 189?" 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=189.
To find the number halfway between 64 and 189, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 64 and 189 into our formula, we get:
(64 + 189)/2 = 126.5
Thus, the number halfway between 64 and 189 is 126.5.
To check that our answer is correct, we subtract 64 from 126.5 and subtract 126.5 from 189 and compare the two numbers:
126.5 - 64 = 62.5
189 - 126.5 = 62.5
As you can see, the halfway number is 62.5 higher than 64 and 62.5 lower than 189. Therefore, our halfway between answer of 126.5 above is correct.
Halfway Between
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Halfway Between 64 and 190
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