When you ask "What number is halfway between 78 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=78 and Y=193.
To find the number halfway between 78 and 193, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 78 and 193 into our formula, we get:
(78 + 193)/2 = 135.5
Thus, the number halfway between 78 and 193 is 135.5.
To check that our answer is correct, we subtract 78 from 135.5 and subtract 135.5 from 193 and compare the two numbers:
135.5 - 78 = 57.5
193 - 135.5 = 57.5
As you can see, the halfway number is 57.5 higher than 78 and 57.5 lower than 193. Therefore, our halfway between answer of 135.5 above is correct.
Halfway Between
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Halfway Between 78 and 194
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