When you ask "What number is halfway between 64 and 513?" 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=513.
To find the number halfway between 64 and 513, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 64 and 513 into our formula, we get:
(64 + 513)/2 = 288.5
Thus, the number halfway between 64 and 513 is 288.5.
To check that our answer is correct, we subtract 64 from 288.5 and subtract 288.5 from 513 and compare the two numbers:
288.5 - 64 = 224.5
513 - 288.5 = 224.5
As you can see, the halfway number is 224.5 higher than 64 and 224.5 lower than 513. Therefore, our halfway between answer of 288.5 above is correct.
Halfway Between
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Halfway Between 64 and 514
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