When you ask "What number is halfway between 8 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=8 and Y=640.
To find the number halfway between 8 and 640, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 640 into our formula, we get:
(8 + 640)/2 = 324
Thus, the number halfway between 8 and 640 is 324.
To check that our answer is correct, we subtract 8 from 324 and subtract 324 from 640 and compare the two numbers:
324 - 8 = 316
640 - 324 = 316
As you can see, the halfway number is 316 higher than 8 and 316 lower than 640. Therefore, our halfway between answer of 324 above is correct.
Halfway Between
Find halfway between two other numbers here!
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