When you ask "What number is halfway between 39 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=39 and Y=243.
To find the number halfway between 39 and 243, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 39 and 243 into our formula, we get:
(39 + 243)/2 = 141
Thus, the number halfway between 39 and 243 is 141.
To check that our answer is correct, we subtract 39 from 141 and subtract 141 from 243 and compare the two numbers:
141 - 39 = 102
243 - 141 = 102
As you can see, the halfway number is 102 higher than 39 and 102 lower than 243. Therefore, our halfway between answer of 141 above is correct.
Halfway Between
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Halfway Between 39 and 244
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