When you ask "What number is halfway between 73 and 646?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=73 and Y=646.
To find the number halfway between 73 and 646, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 73 and 646 into our formula, we get:
(73 + 646)/2 = 359.5
Thus, the number halfway between 73 and 646 is 359.5.
To check that our answer is correct, we subtract 73 from 359.5 and subtract 359.5 from 646 and compare the two numbers:
359.5 - 73 = 286.5
646 - 359.5 = 286.5
As you can see, the halfway number is 286.5 higher than 73 and 286.5 lower than 646. Therefore, our halfway between answer of 359.5 above is correct.
Halfway Between
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Halfway Between 73 and 647
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