When you ask "What number is halfway between 7 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=7 and Y=221.
To find the number halfway between 7 and 221, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 221 into our formula, we get:
(7 + 221)/2 = 114
Thus, the number halfway between 7 and 221 is 114.
To check that our answer is correct, we subtract 7 from 114 and subtract 114 from 221 and compare the two numbers:
114 - 7 = 107
221 - 114 = 107
As you can see, the halfway number is 107 higher than 7 and 107 lower than 221. Therefore, our halfway between answer of 114 above is correct.
Halfway Between
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Halfway Between 7 and 222
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