When you ask "What number is halfway between 3 and 221?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=3 and Y=221.
To find the number halfway between 3 and 221, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 221 into our formula, we get:
(3 + 221)/2 = 112
Thus, the number halfway between 3 and 221 is 112.
To check that our answer is correct, we subtract 3 from 112 and subtract 112 from 221 and compare the two numbers:
112 - 3 = 109
221 - 112 = 109
As you can see, the halfway number is 109 higher than 3 and 109 lower than 221. Therefore, our halfway between answer of 112 above is correct.
Halfway Between
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Halfway Between 3 and 222
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