When you ask "What number is halfway between 64 and 209?" 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=209.
To find the number halfway between 64 and 209, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 64 and 209 into our formula, we get:
(64 + 209)/2 = 136.5
Thus, the number halfway between 64 and 209 is 136.5.
To check that our answer is correct, we subtract 64 from 136.5 and subtract 136.5 from 209 and compare the two numbers:
136.5 - 64 = 72.5
209 - 136.5 = 72.5
As you can see, the halfway number is 72.5 higher than 64 and 72.5 lower than 209. Therefore, our halfway between answer of 136.5 above is correct.
Halfway Between
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Halfway Between 64 and 210
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