When you ask "What number is halfway between 66 and 193?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=66 and Y=193.
To find the number halfway between 66 and 193, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 66 and 193 into our formula, we get:
(66 + 193)/2 = 129.5
Thus, the number halfway between 66 and 193 is 129.5.
To check that our answer is correct, we subtract 66 from 129.5 and subtract 129.5 from 193 and compare the two numbers:
129.5 - 66 = 63.5
193 - 129.5 = 63.5
As you can see, the halfway number is 63.5 higher than 66 and 63.5 lower than 193. Therefore, our halfway between answer of 129.5 above is correct.
Halfway Between
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Halfway Between 66 and 194
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