When you ask "What number is halfway between 73 and 878?" 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=878.
To find the number halfway between 73 and 878, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 73 and 878 into our formula, we get:
(73 + 878)/2 = 475.5
Thus, the number halfway between 73 and 878 is 475.5.
To check that our answer is correct, we subtract 73 from 475.5 and subtract 475.5 from 878 and compare the two numbers:
475.5 - 73 = 402.5
878 - 475.5 = 402.5
As you can see, the halfway number is 402.5 higher than 73 and 402.5 lower than 878. Therefore, our halfway between answer of 475.5 above is correct.
Halfway Between
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Halfway Between 73 and 879
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