When you ask "What number is halfway between 18 and 228?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=18 and Y=228.
To find the number halfway between 18 and 228, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 228 into our formula, we get:
(18 + 228)/2 = 123
Thus, the number halfway between 18 and 228 is 123.
To check that our answer is correct, we subtract 18 from 123 and subtract 123 from 228 and compare the two numbers:
123 - 18 = 105
228 - 123 = 105
As you can see, the halfway number is 105 higher than 18 and 105 lower than 228. Therefore, our halfway between answer of 123 above is correct.
Halfway Between
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Halfway Between 18 and 229
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