When you ask "What number is halfway between 7 and 900?" 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=900.
To find the number halfway between 7 and 900, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 900 into our formula, we get:
(7 + 900)/2 = 453.5
Thus, the number halfway between 7 and 900 is 453.5.
To check that our answer is correct, we subtract 7 from 453.5 and subtract 453.5 from 900 and compare the two numbers:
453.5 - 7 = 446.5
900 - 453.5 = 446.5
As you can see, the halfway number is 446.5 higher than 7 and 446.5 lower than 900. Therefore, our halfway between answer of 453.5 above is correct.
Halfway Between
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