When you ask "What number is halfway between 0 and 640?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=0 and Y=640.
To find the number halfway between 0 and 640, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 0 and 640 into our formula, we get:
(0 + 640)/2 = 320
Thus, the number halfway between 0 and 640 is 320.
To check that our answer is correct, we subtract 0 from 320 and subtract 320 from 640 and compare the two numbers:
320 - 0 = 320
640 - 320 = 320
As you can see, the halfway number is 320 higher than 0 and 320 lower than 640. Therefore, our halfway between answer of 320 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 0 and 641
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