When you ask "What number is halfway between 84 and 290?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=84 and Y=290.
To find the number halfway between 84 and 290, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 290 into our formula, we get:
(84 + 290)/2 = 187
Thus, the number halfway between 84 and 290 is 187.
To check that our answer is correct, we subtract 84 from 187 and subtract 187 from 290 and compare the two numbers:
187 - 84 = 103
290 - 187 = 103
As you can see, the halfway number is 103 higher than 84 and 103 lower than 290. Therefore, our halfway between answer of 187 above is correct.
Halfway Between
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Halfway Between 84 and 291
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