When you ask "What number is halfway between 7 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=7 and Y=243.
To find the number halfway between 7 and 243, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 243 into our formula, we get:
(7 + 243)/2 = 125
Thus, the number halfway between 7 and 243 is 125.
To check that our answer is correct, we subtract 7 from 125 and subtract 125 from 243 and compare the two numbers:
125 - 7 = 118
243 - 125 = 118
As you can see, the halfway number is 118 higher than 7 and 118 lower than 243. Therefore, our halfway between answer of 125 above is correct.
Halfway Between
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Halfway Between 7 and 244
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