When you ask "What number is halfway between 8 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=8 and Y=290.
To find the number halfway between 8 and 290, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 290 into our formula, we get:
(8 + 290)/2 = 149
Thus, the number halfway between 8 and 290 is 149.
To check that our answer is correct, we subtract 8 from 149 and subtract 149 from 290 and compare the two numbers:
149 - 8 = 141
290 - 149 = 141
As you can see, the halfway number is 141 higher than 8 and 141 lower than 290. Therefore, our halfway between answer of 149 above is correct.
Halfway Between
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Halfway Between 8 and 291
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