When you ask "What number is halfway between 30 and 785?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=30 and Y=785.
To find the number halfway between 30 and 785, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 785 into our formula, we get:
(30 + 785)/2 = 407.5
Thus, the number halfway between 30 and 785 is 407.5.
To check that our answer is correct, we subtract 30 from 407.5 and subtract 407.5 from 785 and compare the two numbers:
407.5 - 30 = 377.5
785 - 407.5 = 377.5
As you can see, the halfway number is 377.5 higher than 30 and 377.5 lower than 785. Therefore, our halfway between answer of 407.5 above is correct.
Halfway Between
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Halfway Between 30 and 786
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