When you ask "What number is halfway between 71 and 222?" 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=222.
To find the number halfway between 71 and 222, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 222 into our formula, we get:
(71 + 222)/2 = 146.5
Thus, the number halfway between 71 and 222 is 146.5.
To check that our answer is correct, we subtract 71 from 146.5 and subtract 146.5 from 222 and compare the two numbers:
146.5 - 71 = 75.5
222 - 146.5 = 75.5
As you can see, the halfway number is 75.5 higher than 71 and 75.5 lower than 222. Therefore, our halfway between answer of 146.5 above is correct.
Halfway Between
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Halfway Between 71 and 223
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