When you ask "What number is halfway between 18 and 705?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=18 and Y=705.
To find the number halfway between 18 and 705, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 705 into our formula, we get:
(18 + 705)/2 = 361.5
Thus, the number halfway between 18 and 705 is 361.5.
To check that our answer is correct, we subtract 18 from 361.5 and subtract 361.5 from 705 and compare the two numbers:
361.5 - 18 = 343.5
705 - 361.5 = 343.5
As you can see, the halfway number is 343.5 higher than 18 and 343.5 lower than 705. Therefore, our halfway between answer of 361.5 above is correct.
Halfway Between
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Halfway Between 18 and 706
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