When you ask "What number is halfway between 79 and 218?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=79 and Y=218.
To find the number halfway between 79 and 218, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 218 into our formula, we get:
(79 + 218)/2 = 148.5
Thus, the number halfway between 79 and 218 is 148.5.
To check that our answer is correct, we subtract 79 from 148.5 and subtract 148.5 from 218 and compare the two numbers:
148.5 - 79 = 69.5
218 - 148.5 = 69.5
As you can see, the halfway number is 69.5 higher than 79 and 69.5 lower than 218. Therefore, our halfway between answer of 148.5 above is correct.
Halfway Between
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Halfway Between 79 and 219
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