When you ask "What number is halfway between 91 and 219?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=91 and Y=219.
To find the number halfway between 91 and 219, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 91 and 219 into our formula, we get:
(91 + 219)/2 = 155
Thus, the number halfway between 91 and 219 is 155.
To check that our answer is correct, we subtract 91 from 155 and subtract 155 from 219 and compare the two numbers:
155 - 91 = 64
219 - 155 = 64
As you can see, the halfway number is 64 higher than 91 and 64 lower than 219. Therefore, our halfway between answer of 155 above is correct.
Halfway Between
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Halfway Between 91 and 220
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