When you ask "What number is halfway between 16 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=16 and Y=640.
To find the number halfway between 16 and 640, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 16 and 640 into our formula, we get:
(16 + 640)/2 = 328
Thus, the number halfway between 16 and 640 is 328.
To check that our answer is correct, we subtract 16 from 328 and subtract 328 from 640 and compare the two numbers:
328 - 16 = 312
640 - 328 = 312
As you can see, the halfway number is 312 higher than 16 and 312 lower than 640. Therefore, our halfway between answer of 328 above is correct.
Halfway Between
Find halfway between two other numbers here!
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