When you ask "What number is halfway between 71 and 217?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=71 and Y=217.
To find the number halfway between 71 and 217, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 217 into our formula, we get:
(71 + 217)/2 = 144
Thus, the number halfway between 71 and 217 is 144.
To check that our answer is correct, we subtract 71 from 144 and subtract 144 from 217 and compare the two numbers:
144 - 71 = 73
217 - 144 = 73
As you can see, the halfway number is 73 higher than 71 and 73 lower than 217. Therefore, our halfway between answer of 144 above is correct.
Halfway Between
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Halfway Between 71 and 218
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