When you ask "What number is halfway between 47 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=47 and Y=243.
To find the number halfway between 47 and 243, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 47 and 243 into our formula, we get:
(47 + 243)/2 = 145
Thus, the number halfway between 47 and 243 is 145.
To check that our answer is correct, we subtract 47 from 145 and subtract 145 from 243 and compare the two numbers:
145 - 47 = 98
243 - 145 = 98
As you can see, the halfway number is 98 higher than 47 and 98 lower than 243. Therefore, our halfway between answer of 145 above is correct.
Halfway Between
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Halfway Between 47 and 244
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