When you ask "What number is halfway between 18 and 743?" 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=743.
To find the number halfway between 18 and 743, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 743 into our formula, we get:
(18 + 743)/2 = 380.5
Thus, the number halfway between 18 and 743 is 380.5.
To check that our answer is correct, we subtract 18 from 380.5 and subtract 380.5 from 743 and compare the two numbers:
380.5 - 18 = 362.5
743 - 380.5 = 362.5
As you can see, the halfway number is 362.5 higher than 18 and 362.5 lower than 743. Therefore, our halfway between answer of 380.5 above is correct.
Halfway Between
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Halfway Between 18 and 744
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