When you ask "What number is halfway between 47 and 690?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=47 and Y=690.
To find the number halfway between 47 and 690, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 47 and 690 into our formula, we get:
(47 + 690)/2 = 368.5
Thus, the number halfway between 47 and 690 is 368.5.
To check that our answer is correct, we subtract 47 from 368.5 and subtract 368.5 from 690 and compare the two numbers:
368.5 - 47 = 321.5
690 - 368.5 = 321.5
As you can see, the halfway number is 321.5 higher than 47 and 321.5 lower than 690. Therefore, our halfway between answer of 368.5 above is correct.
Halfway Between
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Halfway Between 47 and 691
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