When you ask "What number is halfway between 7 and 220?" 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=220.
To find the number halfway between 7 and 220, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 220 into our formula, we get:
(7 + 220)/2 = 113.5
Thus, the number halfway between 7 and 220 is 113.5.
To check that our answer is correct, we subtract 7 from 113.5 and subtract 113.5 from 220 and compare the two numbers:
113.5 - 7 = 106.5
220 - 113.5 = 106.5
As you can see, the halfway number is 106.5 higher than 7 and 106.5 lower than 220. Therefore, our halfway between answer of 113.5 above is correct.
Halfway Between
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Halfway Between 7 and 221
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