When you ask "What number is halfway between 70 and 777?" 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=777.
To find the number halfway between 70 and 777, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 70 and 777 into our formula, we get:
(70 + 777)/2 = 423.5
Thus, the number halfway between 70 and 777 is 423.5.
To check that our answer is correct, we subtract 70 from 423.5 and subtract 423.5 from 777 and compare the two numbers:
423.5 - 70 = 353.5
777 - 423.5 = 353.5
As you can see, the halfway number is 353.5 higher than 70 and 353.5 lower than 777. Therefore, our halfway between answer of 423.5 above is correct.
Halfway Between
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Halfway Between 70 and 778
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