When you ask "What number is halfway between 3 and 243?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=3 and Y=243.
To find the number halfway between 3 and 243, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 243 into our formula, we get:
(3 + 243)/2 = 123
Thus, the number halfway between 3 and 243 is 123.
To check that our answer is correct, we subtract 3 from 123 and subtract 123 from 243 and compare the two numbers:
123 - 3 = 120
243 - 123 = 120
As you can see, the halfway number is 120 higher than 3 and 120 lower than 243. Therefore, our halfway between answer of 123 above is correct.
Halfway Between
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Halfway Between 3 and 244
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