When you ask "What number is halfway between 55 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=55 and Y=243.
To find the number halfway between 55 and 243, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 243 into our formula, we get:
(55 + 243)/2 = 149
Thus, the number halfway between 55 and 243 is 149.
To check that our answer is correct, we subtract 55 from 149 and subtract 149 from 243 and compare the two numbers:
149 - 55 = 94
243 - 149 = 94
As you can see, the halfway number is 94 higher than 55 and 94 lower than 243. Therefore, our halfway between answer of 149 above is correct.
Halfway Between
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Halfway Between 55 and 244
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