When you ask "What number is halfway between 7 and 318?" 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=318.
To find the number halfway between 7 and 318, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 318 into our formula, we get:
(7 + 318)/2 = 162.5
Thus, the number halfway between 7 and 318 is 162.5.
To check that our answer is correct, we subtract 7 from 162.5 and subtract 162.5 from 318 and compare the two numbers:
162.5 - 7 = 155.5
318 - 162.5 = 155.5
As you can see, the halfway number is 155.5 higher than 7 and 155.5 lower than 318. Therefore, our halfway between answer of 162.5 above is correct.
Halfway Between
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Halfway Between 7 and 319
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