When you ask "What number is halfway between 73 and 218?" 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=218.
To find the number halfway between 73 and 218, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 73 and 218 into our formula, we get:
(73 + 218)/2 = 145.5
Thus, the number halfway between 73 and 218 is 145.5.
To check that our answer is correct, we subtract 73 from 145.5 and subtract 145.5 from 218 and compare the two numbers:
145.5 - 73 = 72.5
218 - 145.5 = 72.5
As you can see, the halfway number is 72.5 higher than 73 and 72.5 lower than 218. Therefore, our halfway between answer of 145.5 above is correct.
Halfway Between
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Halfway Between 73 and 219
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