When you ask "What number is halfway between 73 and 872?" 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=872.
To find the number halfway between 73 and 872, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 73 and 872 into our formula, we get:
(73 + 872)/2 = 472.5
Thus, the number halfway between 73 and 872 is 472.5.
To check that our answer is correct, we subtract 73 from 472.5 and subtract 472.5 from 872 and compare the two numbers:
472.5 - 73 = 399.5
872 - 472.5 = 399.5
As you can see, the halfway number is 399.5 higher than 73 and 399.5 lower than 872. Therefore, our halfway between answer of 472.5 above is correct.
Halfway Between
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Halfway Between 73 and 873
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