When you ask "What number is halfway between 7 and 291?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=291.
To find the number halfway between 7 and 291, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 291 into our formula, we get:
(7 + 291)/2 = 149
Thus, the number halfway between 7 and 291 is 149.
To check that our answer is correct, we subtract 7 from 149 and subtract 149 from 291 and compare the two numbers:
149 - 7 = 142
291 - 149 = 142
As you can see, the halfway number is 142 higher than 7 and 142 lower than 291. Therefore, our halfway between answer of 149 above is correct.
Halfway Between
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Halfway Between 7 and 292
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