When you ask "What number is halfway between 70 and 485?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=70 and Y=485.
To find the number halfway between 70 and 485, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 485 into our formula, we get:
(70 + 485)/2 = 277.5
Thus, the number halfway between 70 and 485 is 277.5.
To check that our answer is correct, we subtract 70 from 277.5 and subtract 277.5 from 485 and compare the two numbers:
277.5 - 70 = 207.5
485 - 277.5 = 207.5
As you can see, the halfway number is 207.5 higher than 70 and 207.5 lower than 485. Therefore, our halfway between answer of 277.5 above is correct.
Halfway Between
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Halfway Between 70 and 486
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